Download anti-virus software here.
Download the latest SDAT/DATW32/MyWife.d@MM!M24
(aka Blackworm)
Jan. 26, 2006
Platform: Windows 95/98/ME, Windows NT/2000/XP, Windows Server 2003
Risk Assessment: Low
Minimum VirusScan DAT: 4682 (released 1/25/2006)
Minimum VirusScan scan engine: 4.4.00
For more information:
http://vil.nai.com/vil/content/v_138027.htm
http://www.sophos.com/virusinfo/analyses/w32nyxemd.html (Sophos)
http://securityresponse.symantec.com/avcenter/venc/data/w32.blackmal.e@mm.html (Symantec)
http://isc.sans.org/blackworm (SANS ISC)
Symantec Blackmal removal tool
DATA Error [47 0F 94 93 F4 K5]Blackworm is also called W32/MyWife.d@MM!M24 (McAfee), W32/Nyxem-D (Sophos) and W32.Blackmal.e@mm (Symantec). It has been assigned CME-24. See http://cme.mitre.org/ for other aliases for Blackworm.
W32/Sober@MM!M681
(aka W32/Sober-Z (Sophos))
November 23, 2005
Platform: Windows 95/98/ME, Windows NT/2000/XP, Windows Server 2003
Risk Assessment: Medium
Minimum VirusScan DAT: 4635 (released 11/23/2005)
Minimum VirusScan scan engine: 4.4.00
For more information:
http://vil.nai.com/vil/content/v_137072.htm
http://www.sophos.com/virusinfo/analyses/w32soberz.html (Sophos)
Stinger removal tool (v2.5.9, 11/22/05)
W32/Bagle.ck
(aka Troj/BagleDL-U (Sophos))
September 19, 2005
Platform: Windows NT/2000/XP, Windows Server 2003
Risk Assessment: Low
Minimum VirusScan DAT: 4585 (released 9/19/2005)
Minimum VirusScan scan engine: 4.4.00
For more information:
http://vil.nai.com/vil/content/v_136039.htm
http://www.sophos.com/virusinfo/analyses/trojbagledlu.html (Sophos)
W32/IRCbot.worm!MS05-039
(aka W32.Zotob.E (Symantec), W32/Tpbot-A (Sophos))
August 16, 2005
Platform: Windows 2000
Risk Assessment: High
Minimum VirusScan DAT: 4560 (released 8/16/2005)
Minimum VirusScan scan engine: 4.4.00
For more information:
http://vil.nai.com/vil/content/v_135491.htm
Stinger removal tool: v2.5.6 (8/16/05)
http://www.microsoft.com/technet/security/Bulletin/MS05-039.mspx
Be sure to click on the right link for your operating system.
W32/Zotob-A and W32/Zotob-B (Sophos)
(aka W32/Zotob.worm)
August 15, 2005
Platform: Windows 2000
Risk Assessment: Low
Minimum VirusScan DAT: 4558 (released 8/15/2005)
Minimum VirusScan scan engine: 4.4.00
For more information:
http://vil.nai.com/vil/content/v_135433.htm
http://www.sophos.com/virusinfo/analyses/w32zotoba.html (Sophos)
http://www.sophos.com/virusinfo/analyses/w32zotobb.html (Sophos)
http://www.f-secure.com/v-descs/zotob_a.shtml (F-Secure)
http://www.f-secure.com/v-descs/zotob_b.shtml (F-Secure)
W32/SDbot.worm!MS05-039
August 15, 2005
Platform: Windows NT/2000/XP, Windows Server 2003
Risk Assessment: Low
Minimum VirusScan DAT: 4558 (released 8/15/2005)
Minimum VirusScan scan engine: 4.4.00
For more information:
http://vil.nai.com/vil/content/v_135434.htm
W32/Mytob-DY (Sophos)
(aka W32/Mytob.eu@MM)
August 3, 2005
Platform: Windows NT/2000/XP, Windows Server 2003
Risk Assessment: Low
Minimum VirusScan DAT: 4549 (released 8/3/2005)
Minimum VirusScan scan engine: 4.4.00
For more information:
http://vil.nai.com/vil/content/v_135062.htm
http://www.sophos.com/virusinfo/analyses/w32mytobdy.html
W32/Mytob-AZ (Sophos)
(aka W32/Sober.aw@MM)
May 16, 2005
Platform: Windows NT/2000/XP, Windows Server 2003
Risk Assessment: Low
Minimum VirusScan DAT: 4492 (released 5/16/2005)
Minimum VirusScan scan engine: 4.4.00
For more information:
http://vil.nai.com/vil/content/v_133762.htm
http://www.sophos.com/virusinfo/analyses/w32mytobaz.html
W32/Sober.p@MM
(aka W32/Sober-N, W32.Sober.O@mm)
May 2, 2005
Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003
Risk Assessment: Medium
Minimum VirusScan DAT: 4482 (released 5/2/2005)
Minimum VirusScan scan engine: 4.4.00
For more information:
http://vil.nai.com/vil/content/v_133409.htm
Stinger Removal Tool: v2.5.4 (5/2/05) (download filename has been renamed ST1NGER.EXE as Sober.p terminates "stinger" process names)
W32/Bagle.dldr
(aka Trojan.Tooso.B, Troj/BagleDI-L)
March 1, 2005
Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003
Risk Assessment: Medium
Minimum VirusScan DAT: 4437 (released 3/1/2005)
Minimum VirusScan scan engine: 4.4.00
For more information:
http://vil.nai.com/vil/content/v_129512.htm
W32/Mydoom.be@MM
February 22, 2005
Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003
Risk Assessment: Medium
Minimum VirusScan DAT: 4431 (released 2/21/2005)
Minimum VirusScan scan engine: 4.4.00
For more information:
http://vil.nai.com/vil/content/v_131868.htm
Stinger removal tool (v2.5.2, 2/21/05)
Dear user of [target domain],
Your account has been used to send a huge amount of unsolicited email during the recent week.
Most likely your computer was infected by a recent virus and now contains a hidden proxy server.
We recommend that you follow instructions in order to keep your computer safe.
Have a nice day,
[target domain] support team
Dear user of [target domain]
We have received reports that your account was
used to send a large amount of junk email messages
during the last week.
Probably, your computer had been compromised and
now contains a hidden proxy server.
Please follow the instruction in the attached file
in order to keep your computer safe.
Have a nice day,
[domain] user support team.
Dear user of [target domain]The message could not be delivered
Mail server administrator of [domain] would like to inform you that We have detected that your e-mail account has been used to send a large amount of unsolicited e-mail messages during this recent week.
We suspect that your computer had been compromised by a recent virus and now runs a trojan proxy server.
Please follow our instructions in the attachment file in order to keep your computer safe.
Virtually yours
[domain] user support team.
The original message was received at [date & time] from [IP address]The message was undeliverable due to the following reason(s):
----- The following addresses had permanent fatal errors -----
[email address]
----- Transcript of the session follows -----
... while talking to host [hostname]:
>>> MAIL From:[IP address]
<<< 501 User unknown
Session aborted
>>> RCPT To:[email address]
<<< 550 MAILBOX NOT FOUND
W32/Bropia.worm.p
February 18, 2005
Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003
Risk Assessment: Medium
Minimum VirusScan DAT: 4430 (released 2/18/2005)
Minimum VirusScan scan engine: 4.4.00
For more information:
http://vil.nai.com/vil/content/v_131862.htm
W32/Mydoom.bd@MM
February 18, 2005
Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003
Risk Assessment: Medium
Minimum VirusScan DAT: 4430 (released 2/18/2005)
Minimum VirusScan scan engine: 4.4.00
For more information:
http://vil.nai.com/vil/content/v_131861.htm
Stinger removal tool (v2.5.1, 2/18/05)
Dear user of [target domain]
We have received reports that your account was
used to send a large amount of junk email messages
during the last week.
Probably, your computer had been compromised and
now contains a hidden proxy server.
Please follow the instruction in the attached file
in order to keep your computer safe.
Have a nice day,
[domain] user support team.
Dear user of [target domain]The message could not be delivered
Mail server administrator of [domain] would like to inform you that We have detected that your e-mail account has been used to send a large amount of unsolicited e-mail messages during this recent week.
We suspect that your computer had been compromised by a recent virus and now runs a trojan proxy server.
Please follow our instructions in the attachment file in order to keep your computer safe.
Virtually yours
[domain] user support team.
The original message was received at [date & time] from [IP address]The message was undeliverable due to the following reason(s):
----- The following addresses had permanent fatal errors -----
[email address]
----- Transcript of the session follows -----
... while talking to host [hostname]:
>>> MAIL From:[IP address]
<<< 501 User unknown
Session aborted
>>> RCPT To:[email address]
<<< 550 MAILBOX NOT FOUND
W32/Mydoom.bc@MM
February 18, 2005
Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003
Risk Assessment: Medium
Minimum VirusScan DAT: 4430 (released 2/18/2005)
Minimum VirusScan scan engine: 4.4.00
For more information:
http://vil.nai.com/vil/content/v_131860.htm
Stinger removal tool (v2.5.1, 2/18/05)
Dear user of [target domain]
We have received reports that your account was
used to send a large amount of junk email messages
during the last week.
Probably, your computer had been compromised and
now contains a hidden proxy server.
Please follow the instruction in the attached file
in order to keep your computer safe.
Have a nice day,
[domain] user support team.
Dear user of [target domain]The message could not be delivered
Mail server administrator of [domain] would like to inform you that We have detected that your e-mail account has been used to send a large amount of unsolicited e-mail messages during this recent week.
We suspect that your computer had been compromised by a recent virus and now runs a trojan proxy server.
Please follow our instructions in the attachment file in order to keep your computer safe.
Virtually yours
[domain] user support team.
The original message was received at [date & time] from [IP address]The message was undeliverable due to the following reason(s):
----- The following addresses had permanent fatal errors -----
[email address]
----- Transcript of the session follows -----
... while talking to host [hostname]:
>>> MAIL From:[IP address]
<<< 501 User unknown
Session aborted
>>> RCPT To:[email address]
<<< 550 MAILBOX NOT FOUND
W32/Mydoom.bb@MM
(aka W32/MyDoom-o)
February 16, 2005
Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003
Risk Assessment: Medium
Minimum VirusScan DAT: 4429 (to be released 2/16/2005)
Minimum VirusScan scan engine: 4.4.00
For more information:
http://vil.nai.com/vil/content/v_131856.htm
Dear user of [target domain]The message could not be delivered
Mail server administrator of [domain] would like to inform you that We have detected that your e-mail account has been used to send a large amount of unsolicited e-mail messages during this recent week.
We suspect that your computer had been compromised by a recent virus and now runs a trojan proxy server.
Please follow our instructions in the attachment file in order to keep your computer safe.
Virtually yours
[domain] user support team.
The original message was received at [date & time] from [IP address]The message was undeliverable due to the following reason(s):
----- The following addresses had permanent fatal errors -----
[email address]
----- Transcript of the session follows -----
... while talking to host [hostname]:
>>> MAIL From:[IP address]
<<< 501 User unknown
Session aborted
>>> RCPT To:[email address]
<<< 550 MAILBOX NOT FOUND
W32/Sober.k@MM
(aka W32.Sober.j@mm)
January 31, 2005
Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003
Risk Assessment: Medium
Minimum VirusScan DAT: 4424 (released 1/31/2005)
Minimum VirusScan scan engine: 4.4.00
For more information:
http://vil.nai.com/vil/content/v_131355.htm
Stinger removal tool (v2.4.9.2, 1/31/2005)
W32/Bagle.bj@MM, W32/Bagle.bk@MM
(aka W32.Beagle.az@mm)
January 27, 2005
Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003
Risk Assessment: Medium
Minimum VirusScan DAT: 4423 (released 1/27/2005)
Minimum VirusScan scan engine: 4.3.20
For more information:
http://vil.nai.com/vil/content/v_131351.htm
W32/Zafi.d@MM
(aka W32.Erkez.D@mm)
December 14, 2004
Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003
Risk Assessment: Medium
Minimum VirusScan DAT: 4414 (released 12/14/2004)
Minimum VirusScan scan engine: 4.3.20
For more information:
http://vil.nai.com/vil/content/v_130371.htm
W32/Sober.j@MM
November 19, 2004
Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003
Risk Assessment: Medium
Minimum VirusScan DAT: 4409 (released 11/19/2004)
Minimum VirusScan scan engine: 4.3.20
For more information:
http://vil.nai.com/vil/content/v_129531.htm
Stinger Removal Tool (v.2.4.4, 11/8/04)
W32/Mydoom.ah@MM
November 8, 2004
Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003
Risk Assessment: Medium
Minimum VirusScan DAT: 4405 (released 11/9/2004)
Minimum VirusScan scan engine: 4.3.20
For more information:
http://vil.nai.com/vil/content/v_129531.htm
Stinger Removal Tool (v.2.4.4, 11/8/04)
W32/Bagle.bd@MM
(aka W32.Beagle.AW@mm)
October 29, 2004
Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003
Risk Assessment: Medium
Minimum VirusScan DAT: 4403
Minimum VirusScan scan engine: 4.3.20
For more information:
http://vil.nai.com/vil/content/v_129511.htm
Stinger Removal Tool:
http://vil.nai.com/vil/stinger/ (v2.4.3, 10/29/2004)
W32/Bagle.bb@MM
(aka W32.Beagle.AV@mm)
October 29, 2004
Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003
Risk Assessment: Medium
Minimum VirusScan DAT: 4402
Minimum VirusScan scan engine: 4.3.20
For more information:
http://vil.nai.com/vil/content/v_129509.htm
Stinger Removal Tool:
http://vil.nai.com/vil/stinger/ (v2.4.3, 10/29/2004)
W32/Netsky.ag@MM
October 14, 2004
Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003 W32/Bagle.az@MM Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003 W32/Mydoom.s@MM Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003 BackDoor-CHR Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003 W32/Bagle.aq@MM Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003 W32/Mydoom.o@MM Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003 W32/Bagle.ai@MM Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003 W32/Bagle.ag@MM Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003 W32/Bagle.af@MM Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003 W32/Bagle.ad@MM Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003 W32/Lovgate.ad@MM Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003 BackDoor-AXJ Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003 Exploit-MhtRedir.gen Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003 JS/Exploit-DialogArg.bJ Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003 W32/Zafi.b@MM Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003 W32/Lovgate.ab@MM Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003 W32/Bagle.ab@MM Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003 W32/Gaobot.worm.ali Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003 W32/Sasser.worm.d Platform: Windows NT/2000/XP, Windows Server 2003 W32/Sasser.worm.b Platform: Windows NT/2000/XP, Windows Server 2003 W32/Sasser.worm.a Platform: Windows NT/2000/XP, Windows Server 2003 W32/Netsky.ab@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows Server 2003 W32/Bagle.aa@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows Server 2003 W32/Bagle.z@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows Server 2003 W32/Netsky.s@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows Server 2003 W32/Sober.f@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows Server 2003 W32/Netsky.q@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows Server 2003
W32/Bagle.u@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows Server 2003
W32/Netsky.p@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows S
erver 2003 and Internet Explorer 5.01 and 5.5
The second method uses an old vulnerability in Microsoft Internet Explorer 5.01 and 5.5. The virus will execute when one of these versions of Internet Explorer is used to view the infected email.
The last thing that it would do is search the hard drive for the following words and copy itself into those directories:
W32/Bagle.p@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows S
erver 2003
---------------start of EXAMPLE message-----------------
For security reasons attached file is password protected. The password is (attached image inserted here)
Sincerely,
The following Registry key is added to hook system startup: The worm uses the text file icon to disguise itself. The virus copies itself into the Windows System directory as using the following names For example:
IMPORTANT W32/Bagle.n@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows S
erver 2003
Please check the Network Associates web page for a current list of processes and subject lines. http
://vil.nai.com/vil/content/v_101095.htm W32/Netsky.j@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows Server 2003 W32/Sober.d@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows Server 2003 The email has the following characteristics: When the attachment is run, a fake error message may be displayed. For example:
The worm installs itself into the default Windows System directory %SysDir% (c:\windows\system32 or c:\winnt\system32) using one of various possible filenames (constructed from a string pool carried within the worm). For example: W32/Bagle.j@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows Server 2003
W32/Bagle.h@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows Server 2003
W32/Bagle.e@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows Server 2003
This new variant is similar to the W32/Bagle.c worm. It uses different file names to write to the local computer and it has a different file size. It listens on TCP port 2745 for remote connections.
Additionally, the following Registry keys are added: A mutex called "imain_mutex" is created to ensure only one instance of the worm is running at a time. W32/Netsky.d@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows Server 2003
March 1, 2004 - NAI raised the threat level to MEDIUM due to increased prevalence. DAT 4328 (released 2/25/2004) or higher will proactively detect this variant with scanning of compressed files enabled.
Symptoms of Netsky.d are the existence of files and registry keys, unexpected network traffic, and outgoing DNS request to one of the following IP addresses.
W32/Bagle.c@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows Server 2003
This is a mass-mailing worm that has the following characteristics:
Additionally, the following Registry keys are added: A mutex called "imain_mutex" is created to ensure only one instance of the worm is running at a time. W32/Netsky.c@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows S
erver 2003
W32/Netsky.c is a virus that will distirbute itself in 2 ways. The first is through email. It has its own SMTP server that will make a direct connection to your mail server (i.e. mail.hawaii.edu) and send out infected attachments to email addresses that i
t finds in address book files, word processing files (i.e. doc), and web files such as htm, asp, and cgi. Please see the list below. The messages are designed to impersonate the person's email address found in these files. You might receive return to sen
der messages from people that you do not know. Do not open these email's attachments. Please delete them and purge them from your mail boxes.
The email attachment might have a double . extension so that it would be more difficult to detect. This a list of some common extensions.
The first extension may be:
The second method is through peer-to-peer sharing or P2P (i.e. Kazaa). The virus will look for folder names that have "shar" inside of the name (i.e. C:\PROGRAM FILES\COMMON FILES\MICROSOFT SHARED\WEB FOLDERS). The folders can be on your computer or a sha
red folder from a server. It will copy itself into these folders and changes it name (i.e. MS Service Pack 5.exe or Microsoft Office 2003 Crack.exe) The full list of filenames can be found on http://vi
l.nai.com/vil/content/v_101048.htm
Netsky will also remove the registry edits made by previous viruses such as MyDoom, Netsky.a, and others. It will also remove some services from the registry.
The virus removes various Registry values associated with other recent virus (W32/Netsky.a@MM, W32/Netsky.b@MM, W32/Mydoom.a@MM, W32/Mydoom.b@MM, W32/Mimail.t@MM). The following values: are deleted from CurrentVersion\Run CurrentVersion\RunServices Registry keys. The following Registry keys are also deleted:
Symptoms of Netsky.c are the existence of files and registry keys, unexpected network traffic, and outgoing DNS request to a variety or IP addresses.
Manual Removal Instructions
W32/Mydoom.f@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows Server 2003
W32/Mydoom.f@MM is a mass-mailing worm that is spread via email and by copying itself to mapped drives. It opens a backdoor on TCP port 1080 and can download and execute arbitrary files. It will perform a Denial of Service (DoS) attack on www.microsoft.co
m and www.riaa.com, if the infected computer's system date is between the 17th and 22nd of the month. The worm searches drives C: to Z: and deletes files with .mdb, .doc, .xls, .sav, .jpg, .avi, and .bmp extensions. The outgoing messages have attac
hment filenames with .cmd, .bat, .pif, .com, .scr, and .exe extensions, and may be contained in a .ZIP file. The icon of the attachment may make it appear to be a text file. W32/Netsky.b@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows Server 2003
W32/Netsky.b@MM is a mass-mailing worm that is spread via email and by copying itself to folders named share or sharing on the local system and mapped network drives. This results in virus propagation via KaZaa, Bearshare, Limewire, and othe
r P2P applications that use shared folders named share or sharing. It also attempts to deactivate the W32/Mydoom.a@MM and W32/Mydoom.b@MM viruses. The outgoing messages have attachment filenames with a double extension, such as .rtf.pif, and may be contai
ned in a .ZIP file. W32/Bagle.b@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows Server 2003
The ITS mail server (mail.hawaii.edu) is scanning for this threat. W32/Bagle.b@MM is a mass-mailing worm that is from a spoofed address. It listens on TCP port 8866 for remote connections.
The outgoing messages have random attachment names with .EXE file extension (11,264 bytes). If the system date is Feb. 25, 2004 or later, the virus does not propagate. W32/Mimail.s@MM Platform: Windows 9x/ME, Windows NT/2000/XP
When the attachment is run, a fake error message is displayed. The worm checks if a credit card is entered and displays an error message if a dummy number is entered. W32/Mydoom@MM Platform: Windows 9x/ME, Windows NT/2000/XP, Windows Server 2003
W32/Dumaru.y@MM Platform: Windows 9x/ME, Windows NT/2000/XP
The ITS mail server (mail.hawaii.edu) is scanning for this threat. W32/Dumaru.y@MM is a mass-mailing worm that steals data and allows a remote hacker to run commands on your computer, listening on TCP ports 2283 and 10000. The worm captures keystrokes dur
ing web browser sessions, targetting online banking essions. W32/Bagle@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows Server 2003
The ITS mail server (mail.hawaii.edu) is scanning for this threat. W32/Bagle@MM is a mass-mailing worm that pretends to be a test message and is from a spoofed address. It listens on TCP port 6777 for remote connections.
The outgoing messages have random attachment names. If the system date is Jan. 28, 2004 or later, the virus does not propagate. W32/Sober.c@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows Server 2003
Network Associates has raised the alert level of W32/Sober.c@MM to MEDIUM risk due to increased prevalence. Please update your
DAT file to 4310 (released 12/21/03) as soon as possible. The ITS mail server (mail.hawaii.edu) is scanning for this threat. The email has the following characteristics: When the attachment is run, a fake error message is displayed. For example:
The worm installs itself into the default Windows System directory %SysDir% (c:\windows\system32 or c:\winnt\system32) as SYSHOSTX.EXE. Two other copies of the worm are dropped into %SysDir%, with varying filenames. For example: W32/Mimail.i@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows Server 2003
Network Associates has raised the alert level of W32/Mimail.i@MM to MEDIUM risk due to increased prevalence. Please update your
DAT file to 4304 (released 11/14/03) as soon as possible. The email has the following characteristics:
When the attachment is run, the following window is displayed:
The worm installs itself into the default Windows directory %WinDir% as SVCHOST32.EXE (12,832 bytes). The worm creates the following files: W32/Mimail.c@MM Platform: Windows 9x/ME/Windows NT/2000/XP, Windows Server 2003
Network Associates has raised the alert level of W32/Mimail.c@MM to MEDIUM risk due to increased prevalence. Please update your
DAT file to 4301 as soon as possible. The email has the following characteristics:
The worm installs itself into the default Windows directory %WinDir% as NETWATCH.EXE (12,832 bytes). Three other files are dropped into the default Windows directory: W32/Swen@MM Platform: Windows 9x/ME/Windows NT/2000/XP
Sample of the email pretending to be a Microsoft Security Update
W32/Dumaru.a@MM Platform: Windows 9x/ME/Windows NT/2000/XP
Sample of the email
This worm might have a password stealer within it. If it does, McAfee VirusScan will detect the password stealer as PWS-Narod. It will also infect exe files on NTFS volumes using streams. W32/Sobig.f@MM Platform: Windows NT/2000/XP
W32/Nachi.worm Platform: Windows NT/2000/XP/Server 2003
W32/Lovsan.worm (aka Blaster worm) Platform: Windows NT/2000/XP/2003 Server
W32/Mimail@MM Platform: Windows 95/98/ME/NT/2000/XP
There have been many reports of this virus in the wild. Please update your DAT to 4282 as soon as possible. The
Stinger removal tool has been updated to detect and remove this threat. W32/Colevo@MM Platform: Windows 95/98/ME/NT/2000/XP
NAI raised the risk level of this threat to Medium for Home users only. W32/Sobig.e@MM Platform: Windows 95/98/ME/NT/2000/XP
NAI raised the risk level of this threat to Medium to due increased prevalence over the past few hours.
The Stinger tool was updated to detect and remove W32/Sobig.e@MM.
W32/BugBear.b@MM Platform: Windows 95/98/ME/NT/2000/XP The BugBear worm is spreading rapidly
throughout the Internet. There are two methods of infection: network shares and
email attachments. For network shares, the worm copied itself to the Windows
startup folder using a randomly picked name (example of the file name are:
BSFS.EXE). The email attachments are disguised as files that the curious person
would want to look at. In most cases, the attachment's file name matches the
subject line. If you would like to see the most current list of subject lines,
please visit the NAI site
http://vil.nai.com/vil/content/v_100358.htm. BugBear.b installs a key logger
which captures the keystrokes from the infected computer. In addition to the key
logger, there is a remote access trojan which will allow the attacker to gain
access to the infected computer. The trojan part of the worm opens up TCP port
1080 on the infected computer.
Symptoms Please read the full description of
BugBear.b for the
most current information about this worm and recommendations for clean-up.
W32/Sobig.c@MM Platform: Windows 95/98/ME/NT/2000/XP Due to increased prevalence, the risk assessment of this threat
was upgraded to Medium.
W32/Sobig.b@MM Platform: Windows 95/98/ME/NT/2000/XP Starting from the 4266 DAT (released 5/21/03), NAI renamed this
virus from W32/Palyh@MM to http://vil.nai.com/vil/content/v_100307.htm
in order to correctly identify it as a new variant of W32/Sobig@MM.
W32/Fizzer@MM Platform: Windows 95/98/ME/NT/2000/XP This mass-mailing worm has many components and an internal timer
to trigger different processes at different times.
W32/Lovgate@M Platform: Windows 95/98/ME/NT/2000/XP NAI has received samples of another variant of this worm, 78,848
bytes in length. You will need DAT 4249 (released 2/24/03) to detect the
variant, W32/Lovgat.c@M.
W32/SQLSlammer.worm Platform: Windows NT/2000 Server running MS SQL
Server 2000/MS Desktop Engine 2000 This threat has been rated HIGH only for unpatched systems
(SQL servers not running SP3 for MS SQL/MSDE):
W32/Sobig@MM Platform: Windows 95/98/ME/NT/2000/XP Jan. 11, 2003 - NAI has raised the risk level of this
threat to Medium due to increasing prevalence. Please update your DAT file to
4242 as soon as possible.
W32/Lirva.a@MM Platform: Windows 95/98/ME/NT/2000/XP Jan. 9, 2003 - NAI has raised the risk level of this
threat to Medium due to increasing prevalence. Please update your DAT file to
4241 (or higher) as soon as possible. Get the McAfee Livra Removal Tool
(Stinger.exe v1.2 [625,152 bytes, 1/8/03]) if you have been infected with this
virus.
Risk Assessment: Medium
Minimum VirusScan DAT: 4399
Minimum VirusScan scan engine: 4.3.20
For more information:
http://vil.nai.com/vil/content/v_128905.htm
McAfee has released DAT 4399 early due to the increase in prevalence of a new variant W32/Netsky.ag@MM mass mailing worm. The UH repositories have been updated. Please update your McAfee VirusScan DAT to 4399 as soon as possible using the manual "Update Now" method.
Virus Description
-----------------
W32/Netsky.az@MM has the following characteristics:
When run, the worm displays a message box "File corrupted replace this!"
The virus copies itself into the default Windows System directory as
MsnMsgrs.EXE. For example, C:\WINDOWS\SYSTEM32\MsnMsgrs.exe
The system is hooked to run the virus on startup by the following Registry key entry:
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Run "MsnMsgr" = %WinDir%\MsnMsgrs.exe -alev
It copies itself to Windows directory as the following files:
The Subject: field may contain one of the following subjects
The Attachment: field may contain one of the following
The body: field may contain one of the following:
FOR WINDOWS ME/XP USERS: temporarily disable System Restore before running
a full system scan (scan all files, compressed files). See http://vil.nai.com/vil/SystemHelpDocs/DisableSysRestore.htm for
instructions to disable System Restore.
If you need more assistance, please contact the ITS Help Desk at
808-956-8883, 800-558-2669 (toll free from neighbor islands), or email help@hawaii.edu.
(aka W32.Beagle.AR@mm)
September 28, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4395
Minimum VirusScan scan engine: 4.3.20
For more information:
http://vil.nai.com/vil/content/v_128582.htm
Stinger Removal Tool:
http://vil.nai.com/vil/stinger/ (v2.4.0, 9/28/2004)
September 28, 2004 3:15 pm HST
McAfee has released DAT 4395 early to detect a new variant W32/Bagle.az@MM (aka W32.Beagle.AR@mm) mass mailing worm. The UH repositories have been updated. Please update your McAfee VirusScan DAT to 4395 as soon as possible using the manual "Update Now" method.
JPEG (GDI+) Critical Windows Vulnerability (MS04-028)
This is worth repeating... especially since W32/Bagle.az worm downloads a .JPG file.
On Sept. 14, Microsoft announced the JPEG (GDI+) vulnerability in security bulletin MS04-028 affecting Windows operating systems, as well as applications, such as Microsoft Office, Visio, Visual Studio, .NET Framework, and others. Go to http://www.microsoft.com/technet/security/bulletin/ms04-028.mspx for details and patches. This is a CRITICAL update. A specially crafted JPEG can contain code for remote code execution. Code exploiting the JPEG vulnerability was posted to Usenet a few days ago.
Please patch your Windows system (go to http://windowsupdate.microsoft.com) and Microsoft Office (go to http://officeupdate.microsoft.com) as soon as possible.
SANS has released its own GDI scanner (since the Microsoft tool is not too helpful). It checks for vulnerable DLLs on your system (Windows 2000 and higher). Download from http://isc.sans.org/gdiscan.php.
Virus Description
W32/Bagle.az@MM has the following characteristics:
The worm arrives via email with the following characteristics:
FROM: (spoofed; uses email address harvested from local computer)
SUBJECT: (one of the following)
BODY: (one of the following)
ATTACHMENT: (one of the following with EXE, SCR, COM or CPL extension)
The virus copies itself into the default Windows System directory as BAWINDO.EXE. For example,
C:\WINDOWS\SYSTEM32\bawindo.exe.
It also creates other files in the default Windows System directory:
The system is hooked to run the virus on startup by the following Registry key entry:
It creates a mutex to stop variants of virus W32/Netsky running on the infected computer.
These files are created in folders that contain the phrase SHAR (these folders are used with peer to peer applications such as KaZaa, Bearshare, Limewire, etc.):
The worm removes registry keys for other worms and security products:
The worm contacts a long list of websites to retrieve a file named WS.JPG. At the time of the posting, the file was not available on any of the web sites. See http://vil.nai.com/vil/content/v_128582.htm for the complete list of web sites.
FOR WINDOWS ME/XP USERS: temporarily disable System Restore before running
a full system scan (scan all files, compressed files). See http://vil.nai.com/vil/SystemHelpDocs/DisableSysRestore.htm for
instructions to disable System Restore.
If you need assistance, please contact the ITS Help Desk at
808-956-8883 (800-558-2669 toll free from neighbor islands) or
email help@hawaii.edu.
(aka W32.Mydoom.Q@mm)
August 16, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4386
Minimum VirusScan scan engine: 4.3.20
For more information:
http://vil.nai.com/vil/content/v_127616.htm
Stinger Removal Tool:
http://vil.nai.com/vil/stinger/ (v2.3.9, 8/16/2004)
August 16, 2004 2:30 pm HST
A new variant of MyDoom has been released... W32/MyDoom.s@MM has been raised
to MEDIUM risk by McAfee due to increased prevalence. This email virus spreads with a spoofed (forged, pretending to be someone else) FROM address and attachment photos_arc.exe.
The virus harvests email addresses from files on the infected computer and has its own SMTP engine to construct outgoing messages. The harvested addresses are sent the virus. The virus downloads a backdoor trojan, BackDoor-CHR, from 2 websites.
As a pre-caution, please DELETE suspicious email with attachments, even
from people you know. Do not even try to open the attachment. If you try to
open the attachment (and it doesn't successfully open), your Windows computer will get
infected.
W32/Mydoom.s@MM arrives in email with the following characteristics:
FROM: (spoofed, forged)
may use email address harvested from infected computer or use a list of common names with domain t-online.de, mail.com, yahoo.com, hotmail.com or the domain used for your Internet account
SUBJECT: photos
BODY: LOL!;))))
ATTACHMENT: photos_arc.exe
When the attachment is run, the virus copies itself to the default WINDOWS (C:\Windows or C:\Winnt) directory as rasor38a.dll, and to the default Windows SYSTEM (C:\Windows\System, C:\Winnt\System32, or C:\Windows\System32) directory as winpsd.exe.
The virus creates the following registry key values:
The virus downloads a backdoor component from two different websites:
FOR WINDOWS ME/XP USERS: temporarily disable System Restore before running
a full system scan (scan all files, compressed files). See http://vil.nai.com/vil/SystemHelpDocs/DisableSysRestore.htm for
instructions to disable System Restore.
If you need assistance, please contact the ITS Help Desk at
808-956-8883 (800-558-2669 toll free from neighbor islands) or
email help@hawaii.edu.
(aka Backdoor.Nemog)
August 16, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4386
Minimum VirusScan scan engine: 4.3.20
For more information:
http://vil.nai.com/vil/content/v_127617.htm
August 16, 2004 2:30 pm HST
W32/Mydoom.s@MM downloads the remote access trojan, BackDoor-CHR, which has the following characteristics:
The trojan attempts to connect to a remote IRC server to await commands. It carries a list of IP addresses and relevant ports (4661, 4242, 8080, and 3306) for many IRC servers (see virus description for list of servers and ports).
When executed, the trojan copies itself to the startup folder on the victim machine, as DX32HHLP.EXE. For example:
The trojan also drops a 4,096 byte kernel mode driver used for stealthing:
This component is installed as a service on the victim machine. The service information is stored within the following key:
The service bears the following characteristics:
Display name: dx32hhec
Image Path: %SYSTEMROOT%\SYSTEM32\dx32hhec.sys
Startup: Automatic
Note: Once this stealthing driver is running on the victim machine, this threat is not detected by conventional AV scanning methods. You must boot into Safe Mode to detect and remove this trojan.
The trojan appends the local hosts file on the victim machine, redirecting requests for many antivirus and security vendor web sites and update sites to the local host, i.e. the infected computer. Such modified hosts files are detected (and repaired) as QHosts.apd with the 4352 DATs or greater.
Two ports (exact port numbers used vary) are opened by the trojan. For example, TCP 33167 and 33170 were opened in testing.
If you need assistance, please contact the ITS Help Desk at
808-956-8883 (800-558-2669 toll free from neighbor islands) or
email help@hawaii.edu.
(aka W32.Beagle.ao@mm)
August 9, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4384
Minimum VirusScan scan engine: 4.3.40
For more information:
http://vil.nai.com/vil/content/v_127423.htm
Stinger Removal Tool:
http://vil.nai.com/vil/stinger/ (v2.3.8, 8/9/2004)
August 9, 2004 11:30 am HST
McAfee released VirusScan DAT 4384 to detect W32/Bagle.aq@MM. DAT 4384 has been posted to the UH repositories. Please update your VirusScan DAT as soon as possible using the manual "
Update Now" method.
W32/Bagle.aq@MM spreads via email with a spoofed FROM address and
a .ZIP attachment (which contains an EXE and HTML file). The EXE file (same name as the ZIP file) is contained within a folder in the ZIP file so when it is viewed with Explorer (instead of a stand-alone ZIP utility such as WinZip or PKzip) only the HTML file and a folder is visible.
The HTML file contains exploit code which will automatically run the EXE file, which is a downloader trojan, on vulnerable Windows systems. The downloader trojan contacts a large number of websites to retrieve the virus itself.
The worm harvests email addresses from files on the infected computer and has its own SMTP engine to construct outgoing messages.
Warning: since the Bagle source code was released on the Internet in early July 2004, please expect more Bagle variants to be released. As a pre-caution, please DELETE suspicious email with attachments, even from people you know. The current viruses spoof or forge the FROM address, pretending to be sent from someone else. If you try to open the attachment (even if it doesn't successfully open), your Windows computer will get infected.
W32/Bagle.aq@MM arrives in email with the following characteristics:
FROM: (spoofed or forged address)
SUBJECT: (blank)
BODY:
ATTACHMENT (one of the following):
The ZIP file contains PRICE.EXE and PRICE.HTML files.
When the HTML file is run on a vulnerable system, it will run the EXE file. When the EXE file is run (manually or automatically by the HTML file), it copies itself in the default Windows System directory as WINDIRECT.EXE. For example,
C:\WINNT\SYSTEM32\WINdirect.exe
It also drops a DLL file in this directory:
The DLL file is injected into the Explorer.exe process, so its actions will appear to have originated from Explorer.exe.
The following Registry keys are added to hook system startup:
Once the virus executable is downloaded and run by the downloader trojan, the virus copies itself into the Windows System directory as WINDLL.EXE. For example:
It also creates other files in this directory to perform its functions:
The following Registry key is added to hook system startup:
Additionally, the following Registry keys are added:
A mutex is created to ensure only one instance of the worm is running at a time. One of the following mutex names is used in an attempt to stop particular variants of W32/Netsky running on the infected machine:
It opens TCP port 80 and a random UDP port on the infected machine for remote connections.
It attempts to delete registry entries for several security and anti-virus products from these registry keys:
deleting any values that contain these strings:
It attempts to copy itself in any folder with the characters SHAR in its folder name with the following file names:
The SHAR folders are often used in peer-to-peer (P2P) filesharing programs
such as KaZaa, Bearshare, Limeware, etc.
FOR WINDOWS ME/XP USERS: temporarily disable System Restore before running
a full system scan (scan all files, compressed files). See http://vil.nai.com/vil/SystemHelpDocs/DisableSysRestore.htm for
instructions to disable System Restore.
If you need assistance, please contact the ITS Help Desk at
808-956-8883 (800-558-2669 toll free from neighbor islands) or
email help@hawaii.edu.
July 26, 2004
Risk Assessment: Medium on Watch
Minimum VirusScan DAT: 4381
Minimum VirusScan scan engine: 4.3.20
For more information:
http://vil.nai.com/vil/content/v_127033.htm
Stinger Removal Tool:
http://vil.nai.com/vil/stinger/ (v2.3.5, 7/26/2004)
July 26, 2004 9:00 am HST
A new variant of MyDoom has been released... W32/MyDoom.o@MM has been raised
to MEDIUM on WATCH risk by McAfee due to increased prevalence. This email virus spreads with a spoofed (forged, pretending to be someone else) FROM address and attachment with .EXE, .COM, .SCR, .PIF, .BAT, .CMD and .ZIP file extension. If the attachment is a ZIP archive,
the it may be double ZIPped, i.e. a .ZIP within a .ZIP.
The attachment's file extension may use a double extension and there may be multiple spaces between the file extensions to fool users.
The virus harvests email addresses from files (.doc, .txt, .htm, .html) on the infected computer and from any active Microsoft Outlook window. It uses its own SMTP engine to construct outgoing messages. It queries four search engines to harvest email addresses:
The messages may appear to be a bounced message from a mail server with FROM addresses similar to mailer-daemon@(target_domain) or noreply@(target_domain).
The virus contains a remote access component, listening to TCP port 1034.
It also copies itself to folders with the strings USERPROFILE or yahoo.com in the folder name, commonly used by peer-to-peer applications.
As a pre-caution, please DELETE suspicious email with attachments, even
from people you know. Do not even try to open the attachment. If you try to
open the attachment (and it doesn't successfully open), your Windows computer will get
infected.
W32/Mydoom.o@MM arrives in email with the following characteristics:
FROM: (spoofed, forged)
SUBJECT: (one of the following)
ATTACHMENT: (extension EXE, COM, SCR, PIF, BAT, CMD, ZIP)
Target email address as filename or one of the following:
If the W32/Mydoom.o@MM email appears to be a bounced message, it will have one of the following SUBJECT lines:
with the following BODY text:
=======begin body text==========
Dear user of [TargetDomain],
We have received reports that your account was used to send a large amount of junk email messages during the last week. Probably, your computer had been compromised and now contains a hidden proxy server.
Please follow the instruction in the attached file in order to keep your computer safe.
Have a nice day,
[TargetDomain] user support team.
=======end body text================
Upon execution on the victim machine, the worm installs itself as JAVA.EXE in the Windows directory. For example:
It also drops the file SERVICES.EXE (8,192 bytes) into this directory:
Note: there is a legitimate Windows system file in %WinDir%\System32 with filename SERVICES.EXE which must NOT be deleted. Make sure to check the file size.
The following Registry keys are added to hook system startup:
The following Registry keys are also added:
\Run "JavaVM" = %WinDir%\JAVA.EXE
\Run "Services" = %WinDir%\SERVICES.EXE
FOR WINDOWS ME/XP USERS: temporarily disable System Restore before running
a full system scan (scan all files, compressed files). See http://vil.nai.com/vil/SystemHelpDocs/DisableSysRestore.htm for
instructions to disable System Restore.
If you need assistance, please contact the ITS Help Desk at
808-956-8883 (800-558-2669 toll free from neighbor islands) or
email help@hawaii.edu.
(aka W32.Beagle.ag@mm)
July 19, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4379
Minimum VirusScan scan engine: 4.3.40
For more information:
http://vil.nai.com/vil/content/v_126798.htm
Stinger Removal Tool:
http://vil.nai.com/vil/stinger/ (v2.3.4, 7/19/2004)
July 19, 2004 1:35 pm HST
McAfee released VirusScan DAT 4379 to detect W32/Bagle.ai@MM. Please update your VirusScan DAT as soon as possible using the manual
"Update Now" method.
W32/Bagle.ai@MM spreads via email with a spoofed FROM address and
attachment with .EXE, .SCR, .COM, .CPL, and .ZIP (password protected) file extension.
If the attachment is a .ZIP file, the password will be contained in the body
of the message. It harvests email addresses from files on the infected computer and has its own SMTP engine to construct outgoing messages.
Warning: since the Bagle source code was released on the Internet earlier this month, please expect more Bagle variants to be released. As a pre-caution, please DELETE suspicious email with attachments, even from people you know. If you try to open the attachment (even if it doesn't successfully open), your Windows computer will get infected.
W32/Bagle.ai@MM arrives in email with the following characteristics:
FROM: (spoofed address)
SUBJECT:
BODY:
ATTACHMENT (one of the following):
ATTACHMENT extension (one of the following):
If the attachment is a password-protected ZIP archive, the password is included in the message body.
BODY: (one of the following)
The password-protected ZIP files may also contain a second, randomly-named
benign file with extension .INI, .CFG, .TXT, .VXD, .DEF, and .DLL. These files contain random characters.
The virus copies itself in the default Windows System directory as
WinXP.EXE. For example,
C:\WINNT\SYSTEM32\WinXP.exe
It also creates other files in the same directory to perform its functions:
It adds the following Registry key to hook itself on system startup:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
The worm attempts to terminate various security programs and other worms,
i.e. Netsky. It opens a backdoor on TCP port 1080 and UDP port 1040 on the infected machine.
"key " = "%SysDir%\WinXP.exe"
It attempts to delete registry entries for several security and anti-virus products from these registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
deleting any values that contain these strings:
It attempts to copy itself in any folder with the characters SHAR in its folder name with the following file names:
The SHAR folders are often used in peer-to-peer (P2P) filesharing programs
such as KaZaa, Bearshare, Limeware, etc.
FOR WINDOWS ME/XP USERS: temporarily disable System Restore before running
a full system scan (scan all files, compressed files). See http://vil.nai.com/vil/SystemHelpDocs/DisableSysRestore.htm for
instructions to disable System Restore.
If you need assistance, please contact the ITS Help Desk at
808-956-8883 (800-558-2669 toll free from neighbor islands) or
email help@hawaii.edu.
(aka W32.Beagle.ac@mm)
July 19, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4378
Minimum VirusScan scan engine: 4.3.40
For more information:
http://vil.nai.com/vil/content/v_126795.htm
Stinger Removal Tool:
http://vil.nai.com/vil/stinger/ (v2.3.3, 7/19/2004)
July 19, 2004 8:15 am HST
McAfee has released DAT 4378 to detect W32/Bagle.ag@MM.
Please update your VirusScan DAT as soon as possible using the
manual
"Update Now" method. Note: DAT 4378 detects the password-protected ZIP attachment for W32/Bagle.af@MM virus from last week.
W32/Bagle.ag@MM spreads via email with a spoofed FROM address and
attachment with .EXE, .SCR, .COM, .CPL, and .ZIP (password protected) file extension.
If the attachment is a .ZIP file, the password will be contained in the body
of the message (plain text or image). It harvests email addresses from
files on the infected computer and has its own SMTP engine to construct outgoing messages.
W32/Bagle.ag@MM arrives in email with the following characteristics:
FROM: (spoofed address)
SUBJECT (one of the following):
BODY:
(blank)
ATTACHMENT (one of the following):
ATTACHMENT extension (one of the following):
If the attachment is a password-protected ZIP archive, the email has the
password in the message body as a bitmap image:
BODY: (one of the following)
The password-protected ZIP files may also contain a second, randomly-named
benign file with extension .INI, .CFG, .TXT, .VXD, .DEF, and .DLL. These files contain random characters.
The virus copies itself in the default Windows System directory as
SYS_XP.EXE. For example,
C:\WINNT\SYSTEM32\sys_xp.exe
It also creates copies of itself (with garbage appended) in the same
directory:
It adds the following Registry key to hook itself on system startup:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
The worm attempts to terminate various security programs and other worms,
i.e. Netsky. It opens a backdoor on TCP port 1080 on the infected machine.
"key " = "C:\WINNT\System32\sys_xp.exe"
These are the programs that it attempts to terminate:
It attempts to copy itself in any folder with the characters SHAR with the
following file names:
The SHAR folders are often used in peer-to-peer (P2P) filesharing programs
such as KaZaa, Bearshare, Limeware, etc.
FOR WINDOWS ME/XP USERS: temporarily disable System Restore before running
a full system scan (scan all files, compressed files). See http://vil.nai.com/vil/SystemHelpDocs/DisableSysRestore.htm for
instructions to disable System Restore.
If you need assistance, please contact the ITS Help Desk at
808-956-8883 (800-558-2669 toll free from neighbor islands) or
email help@hawaii.edu.
(aka W32.Beagle.ab@mm)
July 15, 2004
Risk Assessment: Medium on Watch
Minimum VirusScan DAT: 4377
Minimum VirusScan scan engine: 4.3.40
For more information: http
://vil.nai.com/vil/content/v_126792.htm
http://www.sophos.com/virusinfo/analyses/w32bagleaf.html
http://securityresponse.symantec.com/avcenter/venc/data/w32.beagle.ab@mm.html
Stinger Removal Tool:
http://vil.nai.com/vil/stinger/ (v2.3.2, 7/15/2004)
July 15, 2004 7:30 pm HST
McAfee has released DAT 4377 to detect W32/Bagle.af@MM.
Please update your VirusScan DAT as soon as possible using the
manual
"Update Now" method.
W32/Bagle.af@MM spreads via email with a spoofed FROM address and
attachment with .EXE, .SCR, .COM, .CPL, and .ZIP file extension.
If the attachment is a .ZIP file, the password will be contained in the body
of the message (plain text or image). It harvests email addresses from
files on the infected computer.
W32/Bagle.af@MM arrives in email with the following characteristics:
FROM: (spoofed address)
SUBJECT (one of the following):
BODY (one of the following):
ATTACHMENT (one of the following):
ATTACHMENT extension (one of the following):
If the attachment is a password-protected ZIP archive, the email has the
following characteristics:
SUBJECT: (one of the following)
BODY: (one of the following)
The password-protected ZIP files may also contain a second, randomly-named
benign file with extension .INI, .CFG, .TXT, .VXD, .DEF, and .DLL. These
files will contain random garbage characters.
The virus copies itself in the default Windows System directory as
SYSXP.EXE. For example,
C:\WINNT\SYSTEM32\sysxp.exe
It also creates copies of itself (with garbage appended) in the same
directory:
It adds the following Registry key to hook itself on system startup:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
The worm attempts to terminate various security programs and other worms,
i.e. Netsky. It opens a backdoor on TCP port 1080 and random UDP ports.
"key " = "C:\WINNT\System32\sysxp.exe"
These are the programs that it attempts to terminate:
It attempts to copy itself in any folder with the characters SHAR with the
following file names:
The SHAR folders are often used in peer-to-peer (P2P) filesharing programs
such as KaZaa, Bearshare, Limeware, etc.
FOR WINDOWS ME/XP USERS: temporarily disable System Restore before running
a full system scan (scan all files, compressed files). See http://vil.nai.com/vil/SystemHelpDocs/DisableSysRestore.htm for
instructions to disable System Restore.
If you need assistance, please contact the ITS Help Desk at
808-956-8883 (800-558-2669 toll free from neighbor islands) or
email help@hawaii.edu.
(aka W32.Beagle.Y@mm)
July 5, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4373 (released 7/5/2004)
Minimum VirusScan scan engine: 4.2.40
For more information: http
://vil.nai.com/vil/content/v_126562.htm
Stinger Removal Tool: http://vil.nai.com/vil/stinger/ (v2.3.0, updated 7/5/2004)
July 5, 2004 3:00 pm HST
McAfee has raised the risk level of W32/Bagle.ad@MM to MEDIUM due to
increased prevalence and
media
attention.
McAfee VirusScan DAT 4373 detects this threat and has been updated on the
UH repositories.
Please update your VirusScan DAT to 4373 as soon as possible using the
manual
"Update Now" method.
The
ITS mail server (mail.hawaii.edu) is scanning for this threat.
The worm includes a copy of its assember source code. Expect to see more Bagle variants released soon based on this source code, i.e.different port number used by backdoor, backdoor password, date of expiry, etc.
W32/Bagle.ad@MM spreads via email with a spoofed FROM address and attachment with .HTA, .VBS, .EXE, .SCR, .COM, .CPL, and .ZIP file extension. If the attachment is a .ZIP file, the password will be contained in the body of the message (plain text or image
). It harvests email addresses from files on the infected computer.
W32/Bagle.ad@MM arrives in email with the following characteristics:
SUBJECT (one of the following):
BODY (one of the following):
ATTACHMENT (one of the following):
ATTACHMENT extension (one of the following):
The virus copies itself in the default Windows System directory as LOADER_NAME.EXE. For example,
C:\WINNT\SYSTEM32\loader_name.exe
It also creates copies of itself with garbage appended in the same directory:
It adds the following Registry key to hook itself on system startup:
The worm attempts to terminate various security programs and other worms, i.e. Netsky. It opens a backdoor on TCP port 1234, which allows the infected computer to be an email relay.
It attempts to copy itself in any folder with the characters SHAR with the following file names:
The SHAR folders are often used in peer-to-peer (P2P) filesharing programs
such as KaZaa, Bearshare, Limeware, etc.
FOR WINDOWS ME/XP USERS: temporarily disable System Restore before running
a full system scan (scan all files, compressed files). See
http://vil.nai.com/vil/SystemHelpDocs/DisableSysRestore.htm for
instructions to disable System Restore.
July 2, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4372 (released 7/2/2004)
Minimum VirusScan scan engine: 4.2.40
For more information: http
://vil.nai.com/vil/content/v_126560.htm
Stinger Removal Tool: http://vil.nai.com/vil/stinger/ (v2.2.9, updated 7/2/2004)
July 2, 2004 3:20 pm HST
McAfee (note name change from NAI) has raised the threat level of
W32/Lovgate.ad@MM to MEDIUM due to increased prevalence. VirusScan DAT
4372 has been released to detect this threat and posted to UH
repositories. Please update your McAfee VirusScan DAT as soon as possible
using the manual
"Update Now"method.
This variant exploits the RPC Buffer Overflow vulnerability (MS03-026,
superceded by MS03-039 patch). MS03-039 patch is available
at http://www.microsoft.com/technet/security/bulletin/MS03-039.mspx.
Please make sure to patch your systems for this vulnerability.
W32/Lovgate.ad@MM is an email worm (152,064 bytes) with these
characteristics:
This variant also uses the RPC Interface Buffer Overflow vulnerability
(MS03-026, superceded by the MS03-039 patch) in order to infect other
machines on the network. MS03-039 patch is available at
http://www.microsoft.com/technet/security/bulletin/MS03-039.mspx.
EMAIL PROPAGATION
The virus responds to unread messages in Microsoft Outlook and Outlook
Express inboxes and deletes the messages after responding to them.
Subject: Re: Original subject
Body:
======
original message body
======
Mail auto-reply:
If you can keep your head when all about you
Are losing theirs and blaming it on you;
If you can trust yourself when all men doubt you,
But make allowance for their doubting too;
If you can wait and not be tired by waiting,
Or, being lied about,don't deal in lies,
Or, being hated, don't give way to hating,
And yet don't look too good, nor talk too wise;
... ... more look to the attachment.
> Get your FREE YAHOO.COM Mail now! <
It also constructs messages using its own SMTP engine.
Subject: (one of the following)
Body: (one of the following)
Attachment: (random strings with EXE, PIF, SCR, ZIP extensions)
NETWORK PROPAGATION
The worm attempts to connect to remote shares (IPC$ and ADMIN$), using a
list of usernames and passwords it carries. If the worm is able to copy itself
to remote shares, it attempts to execute itself remotely. It does this by
copying itself as:
and remotely executing it as a service. The service bears the following
characteristics:
Display name: Windows Management NetWork Service Extensions
It will attempt to gain access to computers on the network by logging in
as an Administrator and using a list of common or simple passwords.
ImagePath: NetManager.exe -exe_start
Startup: Automatic
It creates a network share, "Media," and drops the following files into C:\%Windir%\Media\
RPC DCOM EXPLOIT
When the worm is initially executed it drops 2 files (61,440 bytes) into
the %WinDir%\System32\ folder as:
These files are FTP server components which run a script to download a
file called HXDEF.EXE which is a copy of the worm itself. The worm is
automatically executed after it has been downloaded.
The following Registry key is created to that Netmeeting.exe is executed at startup:
SYMPTOMS
When the worm is executed, various files are dropped on the system. The
following are copies of the worm (152,064 bytes):
The following DLLs are also dropped (all identical). This is the remote
access component, (detected as BackDoor-AQJ):
The following Registry keys are added in order to run the worm at system
startup:
The following Registry key is created so that the worm starts an
additional Service.
The following keys are added to run the backdoor component at system
startup:
The backdoor component is also installed as two services on the victim
machine, the services bearing the following characteristics:
Service 1
Display name: _reg
ImagePath: Rundll32.exe msjdbc11.dll ondll_server
Startup: automatic
Service 2,br>
Display name: Windows Management Protocol v.0 (experimental)
Description: Windows Advanced Server. Performs scheduled scans for
LANguard.
ImagePath: Rundll32.exe msjdbc11.dll ondll_server
Startup: automatic
(aka Backdoor.Berbew (NAV))
June 25, 2004
Risk Assessment: Low-Profiled
Minimum VirusScan DAT: 4370 (released 6/25/2004)
Minimum VirusScan scan engine: 4.2.40
For more information: http
://vil.nai.com/vil/content/v_100488.htm
June 25, 2004
Media attention has been given to several commercial IIS websites being hacked recently to serve exploit script code that results in the new variant BackDoor-AXJ and other trojans being installed on victim computers. Users browsing the compromised
websites, using Internet Explorer, get infected when unsolicited files are downloaded and executed on their computer.
For further details about vulnerable IIS servers and IE clients, see http://www.microsoft.com/security/incident/download_ject.mspx
Once running on the victim's computer, the trojan acts as a web proxy, can check remote server for updates, and logs cached passwords on the victim computer (for sending to the hacker).
This remote access trojan installs itself in the default Windows system directory (e.g. C:\WINNT\SYSTEM32) with a random 8-character filename and drops a DLL with a random 8-character filename. For example,
C:\WINNT\SYSTEM32\OQLCINEI.EXE (39,140 bytes - copy of trojan)
C:\WINNT\SYSTEM32\BAGMBBPJ.DLL (5,633 bytes - dropped DLL)
Two ports (exact port numbers vary between variants) are opened on the victim machine. One port is used for the web proxy, the other for communication. Ports observed in samples include: 7714, 8546, 12334, and 12324.
Notification is sent to the hacker via HTTP, sending data to a remote PHP script. Data includes IP of the computer and port numbers opened. An "identification string" is also sent.
The following registry key is created so the trojan runs when you start Windows:
Value "Web Event Logger"="{79FA9088-19CE-715D-D85A-216290C5B738}" is added to the following registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\
ShellServiceObjectDelayLoad
so the DLL file is loaded when you start Windows. The trojan patches the contents of the dropped DLL file by writing its own filename into it so the DLL file knows the name of the executable file and can run it.
It attempts to access the password cache (includes modem and dial-up passwords, URL passwords, share passwords, and others) on the local computer.
The Trojan may use the following files to log the passwords and to store downloaded configuration data:
%System%\NtXgl16.dat
It attempts to intercept any entered data in active windows. It intercepts contents from the clipboard. It may target Internet bank accounts to steal login information.
%System%\NtXgl16.vxd
%System%\NtXgl16.sys
To effectively intercept entered data, the Trojan wants a user to specifically enter the login details. For this purpose, it attempts to disable password caching and to disallow Autocomplete, by setting the following registry values:
"FormSuggest Passwords"="yes"
"FormSuggest PW Ask"="yes"
"Use FormSuggest"="yes"
in the registry key:
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
June 25, 2004
Risk Assessment: Low-Profiled
Minimum VirusScan DAT: 4370 (released 6/25/2004)
Minimum VirusScan scan engine: 4.2.40
For more information: http
://vil.nai.com/vil/content/v_101033.htm
June 25, 2004
Media attention has been given to several commercial IIS websites being remotely hacked recently. Exploit-MhtRedir.gen was used to redirect the user's web browser to the location http://217.107.218.147 containing an infected web page that caused un
solicited files to be downloaded and executed.
For further details about vulnerable IIS servers and IE clients, see http://www.microsoft.com/security/incident/download_ject.mspx
The exploit results in a CHM (Microsoft Compiled Help) file being written to the local system allowing for additional exploit code to then execute the downloaded file.
The end result is the execution of arbitrary code at the permission level of the current user.
June 25, 2004
Risk Assessment: Low-Profiled
Minimum VirusScan DAT: 4370 (released 6/25/2004)
Minimum VirusScan scan engine: 4.2.40
For more information: http
://vil.nai.com/vil/content/v_126241.htm
June 25, 2004
Media attention has been given to several commercial IIS websites being remotely hacked recently. Code containing the JS/Exploit-DialogArg.b exploit is appended to files (e.g. html, .txt, .gif) in the webfolder of the compromised IIS web server which caus
es unsolicited files to be downloaded and executed on the user's computer. Users are infected when they access these infected web pages with their Internet Explorer web browser.
For further details about vulnerable IIS servers and IE clients, see http://www.microsoft.com/security/incident/download_ject.mspx
June 14, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4366 (released 6/14/2004)
Minimum VirusScan scan engine: 4.2.40
For more information: http
://vil.nai.com/vil/content/v_126242.htm
Stinger Removal Tool: http://vil.nai.com/vil/stinger/ (v2.2.8, updated 6/14/2004)
June 14, 2004 9:00 a.m. HST - NAI has raised the risk of W32/Zafi.b@MM to MEDIUM due to increased prevalence.
W32/Zafi.b@MM spreads via mass email with .EXE, .COM, or .PIF attachments (12,800 bytes) and P2P (peer-to-peer) filesharing, copying itself to folders with SHARE or UPLOAD in the folder name. The worm overwrites executables in directories of anti-virus an
d personal firewall software with a copy of itself. It terminates processes with strings containing REGEDIT, MSCONFIG, and TASK.
The infected email message arrives with a spoofed FROM address. It uses its own SMTP engine to construct messages,in various languages, depending on the top level domain of the recipient's address. For example, user with a .COM email address will receive
a message in English, while someone with a .DE email address will receive a message in German.
Some English examples are:
To: jennifer
Subject: You`ve got 1 VoiceMessage!
Attachment: "link.voicemessage.com.listen.index.php1Ab2c.pif"
Body:
Dear Customer! You`ve got 1 VoiceMessage from voicemessage.com website! Sender: You can listen your Virtual VoiceMessage at the following link: http://virt.voicemessage.com/index.listen.php2=35affv or by clicking the attached link. Send VoiceMessage! Try
our new virtual VoiceMessage Empire! Best regards: SNAF.Team (R).
To: jennifer
Subject: Don`t worry, be happy!
Attachment: "www.ecard.com.funny.picture.index.nude.php356.pif"
Body:
Hi Honey! I`m in hurry, but i still love ya... (as you can see on the picture) Bye - Bye:
To: david
Subject: Check this out kid!!!
Attachment: "jennifer the wild girl xxx07.jpg.pif"
Body:
Send me back bro, when you`ll be done...(if you know what i mean...) See ya,
In addition to these messages, the worm may also arrive with a random attachment name using one of the following extensions: .COM, .EXE, .PIF.
The worm harvest email messages from the local hard drive and stores them in five files in the SYSTEM32 folder using random names and the .DLL file extension.
C:\WINNT\system32\kenbdplk.dll
C:\WINNT\system32\zibscdes.dll
C:\WINNT\system32\qfafsxoz.dll
C:\WINNT\system32\zhzukrhp.dll
C:\WINNT\system32\sdxsuwxt.dll
References to these files are stored in the following Registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\_Hazafibb
When executed, the worm copies itself twice to the default Windows SysTEM32 folder using a random name with a .EXE and .DLL extension.
For example,
C:\WINNT\system32\jrbtgmqi.exe
C:\WINNT\system32\enfrbatm.dll
It creates a Registry key so the file gets executed every time the system starts:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run "_Hazafibb" = %windir%\System32\jrbtgmqi.exe
P2P Propagation
The worm copies itself to directories on the c: drive containing the string SHARE or UPLOAD using the following filenames:
Windows ME/XP users (special removal instructions):
Windows ME/XP utilize a restore utility that backs up selected files automatically to the C:\_Restore folder. This means that an infected file could be stored there as a backup file, and VirusScan will be unable to delete these files. You must temporarily
disable the System Restore Utility to remove the infected files from the C:\_Restore folder. See http://vil.nai.com/vil/SystemHelpDocs/DisableSysRestore.htm for instructions to dis
able System Restore. You may enable System Restore once the viruses have been cleaned or deleted.
May 18, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4361 (released 5/18/2004)
Minimum VirusScan scan engine: 4.2.40
For more information: http
://vil.nai.com/vil/content/v_125301.htm
Stinger Removal Tool: http://vil.nai.com/vil/stinger/ (v2.2.7, updated 5/18/2004)
March 18, 2004 6:30 pm HST - NAI has raised the risk of W32/Lovgate.ab@MM to MEDIUM due to increased prevalence.
W32/Lovgate.ab@MM is a mass mailing and network worm with these characteristics:
To help protect against the spread of W32/Lovgate and similar worms:
Email Component
W32/Lovgate.ab@MM arrives in email with the following characteristics:
FROM: spoofed or using harvested email addresses or using random characters or constructed from a list of common first names with the domain attached.
For example,
Attachment: The worm may be attached with one of the following file extensions:
Additionally, the attachment may be a copy of the worm within a ZIP archive (with either a RAR or ZIP extension). In this case, the worm within the archive may have a double extension, which may contain many spaces (eg. .HTM .EXE).
*** The worm can also reply to unread messages in Microsoft Outlook and Outlook Express inboxes (using MAPI). It deletes the original messages after replying to them. These messages have the following characteristics:
Subject: Re: (original subject)
Attachment: Can be any of the following:
Symptoms
When the worm is executed, it copies itself (108,554 bytes) on the local hard drive as:
The following DLLs (the remote access component) are dropped:
The following Registry keys are added in order to run the worm at system startup:
The following keys are added to run the backdoor component at system startup:
The backdoor component is also installed as two services on the victim machine, the services bearing the following characteristics:
Service 1
Display name: _reg
ImagePath: Rundll32.exe msjdbc11.dll ondll_server
Startup: automatic
Service 2
Display name: Windows Management Protocol v.0 (experimental)
Description: Windows Advanced Server. Performs scheduled scans for LANguard.
ImagePath: Rundll32.exe msjdbc11.dll ondll_server
Startup: automatic
The following Registry keys house the services information:
A copy of the worm in a ZIP archive (which may itself have a .ZIP or .RAR extension) may also be dropped to the root of local and mapped drives. The archive will contain a copy of the worm with a COM, EXE, PIF or SCR extension. The archive may have variou
s filenames, for example:
Peer-to-Peer (P2P) Folder Propagation
The worm copies itself to directories using shared folders commonly used by P2P applications such as KaZaa and Limeware. It copies itself using the following filenames:
Network Propagation
The worm attempts to connect to remote shares (IPC$ and ADMIN$), using a list of usernames and passwords it carries. If the worm is able to copy itself to remote shares, it attempts to execute itself remotely. It does this by copying itself as:
ADMIN$\SYSTEM32\NETMANAGER.EXE
and remotely executing it as a service. The service bears the following characteristics:
Display name: Windows Management NetWork Service Extensions
ImagePath: NetManager.exe -exe_start
Startup: Automatic
The worm replaces EXE files on mapped network drives with a copy of itself and renames the original file with a .ZMX extension.
Windows ME/XP users (special removal instructions):
Windows ME/XP utilize a restore utility that backs up selected files automatically to the C:\_Restore folder. This means that an infected file could be stored there as a backup file, and VirusScan will be unable to delete these files. You must temporarily
disable the System Restore Utility to remove the infected files from the C:\_Restore folder. See http://vil.nai.com/vil/SystemHelpDocs/DisableSysRestore.htm for instructions to dis
able System Restore. You may enable System Restore once the viruses have been cleaned or deleted.
(aka W32.Beagle.x@MM)
May 10, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4359 (released 5/10/2004)
Minimum VirusScan scan engine: 4.2.40
For more information: http
://vil.nai.com/vil/content/v_125089.htm
Stinger Removal Tool: http://vil.nai.com/vil/stinger/ (v2.2.6, updated 5/10/2004)
NAI has raised the threat level of new variant, W32/Bagle.ab@MM, to MEDIUM to due increased prevalence.
W32/Bagle.ab@MM arrives via email with a spoofed FROM address and various possible attachments (with garbage appended). It has its own SMTP engine to construct email messages and harvests email addresses from files on the local system.
It opens TCP port 2535 on the victim computer, allowing remote access.
The worm is also spread via files on shared folders with the phrase SHAR used in peer-to-peer filesharing applications such as KaZaa, Bearshare, Limeware, etc.
When the worm is executed, a false error message will be displayed:
This is a mass-mailing worm with the following characteristics:
The worm arrives in email with these characteristics:
FROM: (spoofed)
SUBJECT: (one of the following)
Body Text: Various strings constructed by the worm's own SMTP engine
If the attachment is a ZIP file, then the Body will contain one of the following messages:
followed by a copy of an image file dropped as drvddll.exeopenopen.
If the attachment is not a ZIP file, the Body will be blank.
ATTACHMENT: (one of the following)
with one of the following file extensions:
Script dropper - using one of the following file extensions:
The executable using an icon that looks like an envelope.
The CPL file uses an icon that looks like 2 gears.
The virus copies itself in the Windows System directory as DRVDDLL.EXE.
For example, c:\winnt\system32\drvddll.exe.
It also creates other files in the Windows System directory:
A copy of the worm, CPLSTUB.EXE, is dropped in the Windows directory.
The worm adds the following Registry key to hook the system on startup:
The worms attempts to terminate anti-virus, security and Windows programs, such as regedit.exe.
The virus listens on TCP port 2535 for remote connections. It attempts to notify the author that the infected system is ready to accept commands, by contacting various websites, calling a PHP script on the remote sites (mostly in Germany).
It copies files (containing the worm) to folders with the phrase SHAR, which is commonly used in peer-to-peer filesharing programs like KaZaa, Bearshare, Limeware, etc.
For Windows ME/XP users:
Windows ME/XP utilize a restore utility that backs up selected files automatically to the C:\_Restore folder. This means that an infected file could be stored there as a backup file, and VirusScan will be unable to delete these files. You must disable the
System Restore Utility to remove the infected files from the C:\_Restore folder. See http://vil.nai.com/vil/SystemHelpDocs/DisableSysRestore.htm for instructions to disable System
Restore.
May 4, 2004
Risk Assessment: Low
Minimum VirusScan DAT: 4358 (released 5/5/2004)
Minimum VirusScan scan engine: 4.2.40
For more information: http://vil.nai.com/vil/content/v_125006.htm
W32/Gaobot.worm.ali appears to be the first Gaobot (aka Agobot) variant that exploits the MS04-011 (LSASS vulnerability). Although this virus is rated LOW (depends on an IRC server which is no longer available), it is presumed that other more functional v
ariants will soon follow. DAT 4358 is scheduled for release on May 5, 2004.
Note: this variant has been detected at one of the UH Community Colleges and UH Manoa and may be confused with the Sasser worm (which also shuts down and restarts computers).
*** Important: if you have not already patched your Windows system (Windows NT, Windows 2000, Windows XP, Windows server 2003), please do so ASAP. Go to http://windowsupdate.microsoft.com, click on scan for
updates, and install all critical updates. Windows Update should be done regularly, at least once or twice a month.
You can also get the MS04-011 (KB835732) patch from http://www.microsoft.com/technet/security/bulletin/ms04-011.mspx.
Unless you patch your Windows, your system will get infected (or reinfected even after you clean your virus infection). You MUST patch your system; running Stinger or scanning all files on your hard drive is NOT sufficient.
For maximum protection against the Gaobot family (more than 900 variants), users are recommended to:
The virus contains lots of remote access functionality, including:
When run, this virus copies itself to the Windows System directory (c:\winnt\system32 or c:\windows\system32) as msiwin84.exe and creates several registry run keys in order to load itself at system startup.
The virus attempts to run a speed test for Internet connectivity by contacting various web sites.
The virus attempts to connect to an Internet Relay Chat server (TCP Port 6667) to allow for a remote attack to send commands to the infected system:
This threat is reliant upon connecting to this IRC server, and receiving spread commands in order to propagate. At the time of this writing, the DNS entry for this domain has been set to 0.0.0.0, therefore crippling this threat.
Infected systems list on two random TCP ports, which are control ports for attackers to exploit.
The local HOSTS file (%SysDir%\drivers\etc\hosts) is overwriten to block access to various anti-virus and security web sites (note this file is detected with current DAT files as Qhosts.apd).
It also attempts to terminate anti-virus, security, other viruses and Windows programs, e.g. regedit.exe.
The worm spreads via accessible or poorly secured network shares. It has a list of commonly used username/password combinations.
For Windows ME/XP users:
Windows ME/XP utilize a restore utility that backs up selected files automatically to the C:\_Restore folder. This means that an infected file could be stored there as a backup file, and VirusScan will be unable to delete these files. You must disable the
System Restore Utility to remove the infected files from the C:\_Restore folder. See http://vil.nai.com/vil/SystemHelpDocs/DisableSysRestore.htm for instructions to disable System
Restore.
May 4, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4357 (released 5/4/2004)
Minimum VirusScan scan engine: 4.2.40
For more information: http
://vil.nai.com/vil/content/v_125012.htm
Stinger Removal Tool: http://vil.nai.com/vil/stinger/ (v2.2.5, updated 5/4/2004)
May 4, 2004 - NAI has raised the risk of W32/Sasser.worm.d to MEDIUM due to increased prevalence.
W32/Sasser.worm.d is an Internet worm that spreads via the network, exploiting unpatched Windows systems with the vulnerability described in Microsoft Security Bulletin MS04-011 (
KB835732). This worm doesn't spread via email. No user intervention is required to become infected or to propagate the worm further. The worm instructs vulnerable systems to download and the execute the viral code.
Windows NT, Windows 2000, Windows XP and Windows server 2003 users must patch their system for the MS04-011 LSASS vulnerability to prevent infection (and reinfection). Go to http://windowsupdate.microsoft.com
a>, scan for updates, and install all critical updates. The patch is also available at http://www.microsoft.com/technet/security/bulletin/ms04-011.mspx.
Note: the Sasser worm can run on (but not infect) Windows 95/98/ME computers. These systems can be used to infect other vulnerable systems.
W32/Sasser.worm.d functions similarly as the original variant, with the following exceptions:
The worm spreads with filename skynetave.exe (16,384 bytes). It copies itself to the Windows directory and creates a registry key to load itself on startup:
The worm scans random ip addresses for exploitable systems, using successive TCP ports starting at 1068. When it finds a vulnerable system, it causes a buffer overflow in LSASS.EXE. It creates a remote shell on TCP port 9995 and creates an FTP script name
d cmd.ftp on the remote host and executes it. The FTP script instructs the target system to download and execute the worm (filename #_upd.exe) from the infected host. The infected host accepts FTP traffic on TCP port 5554.
A file named win2.log is created on the root of the C: drive. This file contains an IP address and the number of computers infected.
Copies of the worm are created in the Windows System directory as #_up.exe where # is a 4- or 5-digit number.
Examples
A side-effect of the worm is for LSASS.EXE to crash; by default the system will reboot after the crash occurs.
You may get the following windows when LSASS.EXE crashes:


The worm spawns multiple threads, some of which scan the local class A subnet, others the class B subnet, and others completely random subnets. The worm scans private IPs such as 10.0.0.0 and 192.168.0.0 only if they are part of the local subnet. The des
tination port is TCP 445.
For Windows XP users:
Windows XP utilize a restore utility that backs up selected files automatically to the C:\_Restore folder. This means that an infected file could be stored there as a backup file, and VirusScan will be unable to delete these files. You must disable the Sy
stem Restore Utility to remove the infected files from the C:\_Restore folder. See http://vil.nai.com/vil/SystemHelpDocs/DisableSysRestore.htm for instructions to disable System Res
tore.
May 3, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4356 (released 5/2/2004)
Minimum VirusScan scan engine: 4.2.40
For more information: http
://vil.nai.com/vil/content/v_125008.htm
Stinger Removal Tool: http://vil.nai.com/vil/stinger/ (v2.2.4, updated 5/2/2004)
May 2, 2004 - NAI has raised the risk of W32/Sasser.worm.b to MEDIUM due to increased prevalence.
W32/Sasser.worm.b is an Internet worm that spreads via the network, exploiting unpatched Windows systems with the vulnerability described in Microsoft Security Bulletin MS04-011 (
KB835732). This worm doesn't spread via email. No user intervention is required to become infected or to propagate the worm further. The worm instructs vulnerable systems to download and the execute the viral code.
Windows NT, Windows 2000, Windows XP and Windows server 2003 users must patch their system for the MS04-011 vulnerability to prevent infection (and reinfection). Go to http://windowsupdate.microsoft.com, sc
an for updates, and install all critical updates. The patch is also available at http://www.microsoft.com/technet/security/bulletin/ms04-011.mspx.
Note: the Sasser worm can run on (but not infect) Windows 95/98/ME computers. These systems can be used to infect other vulnerable systems.
The worm spreads with filename aserve2.exe (15,872 bytes). It copies itself to the Windows directory and creates a registry key to load itself on startup:
The worm scans random ip addresses for exploitable systems, using successive TCP ports starting at 1068. When it finds a vulnerable system, it causes a buffer overflow in LSASS.EXE. It creates a remote shell on TCP port 9996 and creates an FTP script name
d cmd.ftp on the remote host and executes it. The FTP script instructs the target system to download and execute the worm (filename #_upd.exe) from the infected host. The infected host accepts FTP traffic on TCP port 5554.
A file named win2.log is created on the root of the C: drive. This file contains an IP address.
Copies of the worm are created in the Windows System directory as #_up.exe.
Examples
A side-effect of the worm is for LSASS.EXE to crash; by default the system will reboot after the crash occurs.
You may get the following windows when LSASS.EXE crashes:


The worm spawns multiple threads, some of which scan the local class A subnet, others the class B subnet, and others completely random subnets. The destination port is TCP 445.
For Windows XP users:
Windows XP utilize a restore utility that backs up selected files automatically to the C:\_Restore folder. This means that an infected file could be stored there as a backup file, and VirusScan will be unable to delete these files. You must disable the Sy
stem Restore Utility to remove the infected files from the C:\_Restore folder. See http://vil.nai.com/vil/SystemHelpDocs/DisableSysRestore.htm for instructions to disable System Res
tore.
May 3, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4355 (released 5/1/2004)
Updated VirusScan DAT: 4356 (released 5/2/2004)
Minimum VirusScan scan engine: 4.2.40
For more information: http
://vil.nai.com/vil/content/v_125007.htm
Stinger Removal Tool: http://vil.nai.com/vil/stinger/ (v2.2.4, updated 5/2/2004)
May 1, 2004 - NAI raised the risk of W32/Sasser.worm.a to MEDIUM due to increased prevalence.
W32/Sasser.worm.a is an Internet worm that spreads via the network, exploiting unpatched Windows systems with the vulnerability described in Microsoft Security Bulletin MS04-011 (
KB835732). This worm doesn't spread via email. No user intervention is required to become infected or to propagate the worm further. The worm instructs vulnerable systems to download and the execute the viral code.
Windows NT, Windows 2000, Windows XP and Windows server 2003 users must patch their system for the MS04-011 vulnerability to prevent infection (and reinfection). Go to http://windowsupdate.microsoft.com, sc
an for updates, and install all critical updates. The patch is also available at http://www.microsoft.com/technet/security/bulletin/ms04-011.mspx.
Note: the Sasser worm can run on (but not infect) Windows 95/98/ME computers. These systems can be used to infect other vulnerable systems.
The worm spreads with filename aserve.exe (15,872 bytes). It copies itself to the Windows directory and creates a registry key to load itself on startup:
The worm scans random ip addresses for exploitable systems, using successive TCP ports starting at 1068. When it finds a vulnerable system, it causes a buffer overflow in LSASS.EXE. It creates a remote shell on TCP port 9996 and creates an FTP script name
d cmd.ftp on the remote host and executes it. The FTP script instructs the target system to download and execute the worm (filename #_upd.exe) from the infected host. The infected host accepts FTP traffic on TCP port 5554.
A file named win.log is created on the root of the C: drive. This file contains the IP address of the local host.
Copies of the worm are created in the Windows System directory as #_up.exe.
Examples
A side-effect of the worm is for LSASS.EXE to crash; by default the system will reboot after the crash occurs.
You may get the following windows when LSASS.EXE crashes:


The worm spawns multiple threads, some of which scan the local class A subnet, others the class B subnet, and others completely random subnets. The destination port is TCP 445.
For Windows XP users:
Windows XP utilize a restore utility that backs up selected files automatically to the C:\_Restore folder. This means that an infected file could be stored there as a backup file, and VirusScan will be unable to delete these files. You must disable the Sy
stem Restore Utility to remove the infected files from the C:\_Restore folder. See http://vil.nai.com/vil/SystemHelpDocs/DisableSysRestore.htm for instructions to disable System Res
tore.
April 28, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4354 (released 4/28/2004 9:25 am HST)
Minimum VirusScan scan engine: 4.2.40
For more information: http
://vil.nai.com/vil/content/v_124873.htm
Stinger Removal Tool: http://vil.nai.com/vil/stinger/ (v2.2.2, updated 4/28/2004)
W32/Netsky.ab@MM variant has been raised to MEDIUM risk due to increased prevalence.
W32/Netsky.ab@MM is spread via email, arriving from a spoofed or forged FROM address, and attachment with a PIF extension. Outgoing email messages are constructed using the virus' SMTP engine. Email addresses are harvested from files on the local computer
.
W32/Netsky.ab@MM arrives in email with the following characteristics:
FROM: (spoofed, using one of the harvested email addresses)
SUBJECT: (one of the following)
BODY: (one of the following)
ATTACHMENT: (PIF extension with one of the following filenames)
The virus installs itself as CSRSS.EXE in the default Windows directory, e.g. c:\windows or c:\winnt.
It adds a Registry key to hook the system on startup:
It sends DNS queries to one of the following hard-coded IP addresses:
(aka W32.Beagle.x@MM)
April 28, 2004
Risk Assessment: Medium on Watch
Minimum VirusScan DAT: 4354 (released 4/28/2004 9:25 am HST)
Minimum VirusScan scan engine: 4.2.40
For more information: http
://vil.nai.com/vil/content/v_124875.htm
Stinger Removal Tool: http://vil.nai.com/vil/stinger/ (v2.2.2, updated 4/28/2004)
NAI has raised the threat level of new variant, W32/Bagle.aa@MM, to MEDIUM on Watch to due increased prevalence.
W32/Bagle.aa@MM arrives via email with a spoofed FROM address and various possible attachments (with garbage appended). It has its own SMTP engine to construct email messages and harvests email addresses from files on the local system.
The worm is also spread via files on shared folders with the phrase SHAR used in peer-to-peer filesharing applications such as KaZaa, Bearshare, Limeware, etc.
When the worm is executed, a false error message will be displayed:
The email message will have the following characteristics:
FROM: (spoofed)
SUBJECT: (one of the following)
Body Text: Various strings constructed by the worm's own SMTP engine
If the attachment is a ZIP file, then the Body will contain one of the following messages:
followed by a copy of an image file dropped as drvddll.exeopenopen.
If the attachment is not a ZIP file, the Body will be blank.
Attachment: (one of the following)
with one of the following file extensions:
Script dropper - using one of the following file extensions:
The executable using an icon that looks like an envelope.
The CPL file uses an icon that looks like 2 gears.
A file named CPLSTUB.EXE (copy of the worm) is dropped in the default Windows directory, e.g. c:\windows or c:\winnt.
The following Registry key is added to hook system startup:
HKEY_CURRENT_USER\Software\Microsoft\Windows\
CurrentVersion\Run "drvddll.exe" = C:\WINNT\SYSTEM32\drvddll.exe
The worm attempts to terminate anti-virus, security and Windows programs such as REGEDIT.EXE . See http://vil.nai.com/vil/content/v_124875.htm for complete list.
It opens TCP port 2535 on the victim's computer and sends notification to the virus author that the computer is ready to accept remote commands, by calling a PHP script on remote web sites (mostly in Germany).
It creates copies of itself in folders with the phrase shar (commonly used with peer-to-peer filesharing like KaZaa). The infected files will have the following filenames:
For Windows ME/XP users:
Windows ME and XP utilize a restore utility that backs up selected files automatically to the C:\_Restore folder. This means that an infected file could be stored there as a backup file, and VirusScan will be unable to delete these files. You must disable
the System Restore Utility to remove the infected files from the C:\_Restore folder. See http://vil.nai.com/vil/SystemHelpDocs/DisableSysRestore.htm for instructions to disable System Restore.
(aka W32.Beagle.W@MM)
April 26, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4353 (released 4/26/2004 11:50 am HST)
Minimum VirusScan scan engine: 4.2.40
For more information: http
://vil.nai.com/vil/content/v_122415.htm
Stinger Removal Tool: http://vil.nai.com/vil/stinger/ (v2.2.1, updated 4/26/2004)
NAI has raised the threat level of new variant, W32/Bagle.z@MM, to MEDIUM to due increased prevalence. Please update your McAfee VirusScan DAT to 4353 (released 4/26/04 11:50 am HST), using the manual updater method described at http://www.hawaii.edu/anti
virus/howtoupdate.html.
W32/Bagle.z@MM arrives via email with a spoofed FROM address and various possible attachments (with garbage appended). It has its own SMTP engine to construct email messages and harvests email addresses from files on the local system.
The worm is also spread via files on shared folders with the phrase SHAR used in peer-to-peer filesharing applications such as KaZaa, Bearshare, Limeware, etc.
When the worm is executed, a false error message will be displayed:
The email message will have the following characteristics:
FROM: (spoofed)
It may use these address strings:
SUBJECT: (one of the following)
Body Text: Various strings constructed by the worm's own SMTP engine
Part 1:
Part 2:
Part 3:
If the attachment is a password-protected ZIP file, one of the following is attached to the email:
-------------------------------------
Here is a sample message:
Hello [NAME],
[IMAGE]
i am honest, responsible, romantic person. iwould like to find my only
love,to find my destiny.
For more information see the attached file.
Attached file is protected with the password for security reasons.
Password is [IMAGE]
Best wishes, Annie
-------------------------------------
Attachment: (one of the following)
The executable using an icon that looks like 3 cherries.
The CPL file uses an icon that looks like 2 gears.
The virus copies itself into the Windows System directory as drvsys.exe. For example:
C:\WINNT\SYSTEM32\drvsys.exe
It also creates other files in this directory to perform its functions:
The following Registry key is added to hook system startup:
HKEY_CURRENT_USER\Software\Microsoft\Windows\
CurrentVersion\Run "drvsys.exe" = C:\WINNT\SYSTEM32\drvsys.exe
The worm attempts to terminate anti-virus, security and Windows programs such as REGEDIT.EXE .
It opens TCP port 2535 on the victim's computer and sends notification to the virus author that the computer is ready to accept remote commands, by calling a PHP script on remote web sites.
It creates copies of itself in folders with the phrase shar (commonly used with peer-to-peer filesharing like KaZaa). The infected files will have the following filenames:
April 6, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4348 (released 4/6/2004 9:00 am HST)
Minimum VirusScan scan engine: 4.2.40
For more information: http
://vil.nai.com/vil/content/v_101156.htm
Stinger Removal Tool: http://vil.nai.com/vil/stinger/ (v2.2.0, updated 4/6/2004)
W32/Netsky.s@MM is spread via mass email with a spoofed FROM address and attachment with a .PIF extension (18,432 bytes). It gathers email addresses from files on drives C: through Z: (excluding CD-ROM drives). It has a backdoor component, opening TCP por
t 6789 on the victim's computer, which facilitates downloading and execution of files. If the system date is between April 14-23, the worm launches a denial of service (DoS) attack on several web sites.
The email arrives with the following characteristics:
From: (spoofed or forged)
Subject: (one of the following):
Body: various message bodies constructed from strings within the worm, using its own SMTP engine
The first part is one of the following:
The second part is one of the following, where %s is the attachment name:
The third part is one of the following:
The fourth part is one of the following:
Attachment: .PIF extension, with filename from the following and a random number appended to it. For example, picture_document8.pif.
+++ X-Attachment-Status: no virus found
+++ Powered by the new Panda OnlineAntiVirus
+++ Website: www.pandasoftware.com
+++ X-Attachment-Status: no virus found
+++ Powered by the new MCAfee OnlineAntiVirus
+++ Homepage: www.mcafee.com
+++ X-Attachment-Status: no virus found
+++ Powered by the new F-Secure OnlineAntiVirus
+++ Visit us: www.f-secure.com
+++ X-Attachment-Status: no virus found
+++ Powered by the new Norton OnlineAntiVirus
+++ Free trial: www.norton.com
Here is an email sample of W32/Netsky.s@MM:
Technical Information:
The worm installs itself in the Windows directory as EASYAV.EXE.
It adds a registry key to hook itself on startup:
It copies itself as UINMZERTINMDS.OPM (base-64 encoded) in the Windows directory.
It opens TCP port 6789 on the infected computer and launches a denial of service (DoS) attack on the following websites, if the current system date is between April 13-24, 2004:
The worm queries DNS at one of the following IPs:
April 5, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4347 (released 4/5/2004 9:00 am HST)
Minimum VirusScan scan engine: 4.2.40
For more information: http
://vil.nai.com/vil/content/v_101154.htm
Stinger Removal Tool: http://vil.nai.com/vil/stinger/ (v2.1.9, updated 4/4/2004)
W32/Sober.f@MM is spread via mass email (written in English or German), by
sending itself to email addresses harvested from files on the infected system. It does
not use any exploits to automatically execute the attachment. Users must
choose to open the attachment to get infected. Be careful when opening unexpected attachments.
The email arrives with the following characteristics (English version listed):
(German version of email is listed at http://vil.nai.com/vil/content/v_101154.htm.)
FROM: (spoofed or forged)
SUBJECT: (one of the following):
Body: (one of the following)
ATTACHMENT: file with .PIF (30,720 bytes) or a .ZIP (30,866 bytes) extension
Who could suspect something like that?
shock
see, what i've found!
i've found a shity virus on my pc. check your pc, too!
follow the steps in this article.
bye
your_passwords
I hope you accept the result!
Please read the document
Protected message is attached.
++++ Service: http://www.(domain name)
++++ Mail To: User-info
Remote_host_said:_554_delivery_error:_dd_
Sorry_your_message_cannot_be_delivered._
This_account_has_been_disabled_or_discontinued_[#102]._-_mta134.mail.dcn.com
** End of Transmission
--- Mail To: UserHelp
Error_Info
_attach
Read the attachment for details.
Bad Gateway: The message has been attached.
+++ A service of
+++ Mail: home
-- Partial message is available!
-- Error: llegal signs in Mail-Routing
-- Mail Server: ESMTP VX32.9 Version Betha Alpha
Mail Scanner: No Virus found
Anti-Virus: No Virus!
One of the following names (filename may be preceded
by random numbers and appended with _attach):
Technical Information:
When the worm is executed, it drops the following files in the default
Windows System32 %system32% folder (c:\Windows\System or c:\WinNT\System32):
The worm copies itself to the %system32% folder using a filename
constructed from the following strings: 32, crypt, data, diag, dir, disc,
explorer, host, log, run, service, smss32, spool, sys, win. For example,
WINSYSSERVICE.EXE or DISCDIRRUN.EXE.
It creates a registry key to get itself started on system bootup:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run\
[generated string] = C:\WINNT\System32\[generated string].exe
Registry key is also created:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
[generated string]
Once the computer has been infected, read-access to its file may be denied. Then VirusScan scanner will not be able to detect the file. If a computer is suspected of being infected, the following removal procedure is recommended:
March 29, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4345 (released 3/29/2004 6:30 am HST)
Minimum VirusScan scan engine: 4.2.40
For more information: http
://vil.nai.com/vil/content/v_101145.htm
Stinger Removal Tool: http://vil.nai.com/vil/stinger/(v2.1.8, updated 3/29/2004 HST)
W32/Netsky.q@MM spreads via mass email and arrives with a spoofed or
forged FROM address, variable subject, variable message body and variable
attachment (28,008 bytes) with a .PIF, .SCR, .ZIP, or .EML file
extension.
The worm copies itself as SysMonXP.exe in the Windows directory. It
creates the following files in the Windows directory:
The following registry key is created:
The email has the following characteristics:
From: (spoofed or forged)
Subject:
Body:
Attachment: (random filename generated from 3 parts below)
For example, message2.zip or data.pif.
The worm harvests email addresses from files on the local system with file extensions including .PPT, .XLS, .HTML, .HTM, .DBX, .CGI, .DOC, .WAB, .ASP, .PHP, .TXT, .EML (for complete list of file extens
ions)
March 28, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4344 (released 3/26/2004)
Minimum VirusScan scan engine: 4.2.40
For more information: http
://vil.nai.com/vil/content/v_101141.htm
Stinger Removal Tool: http://vil.nai.com/vil/stinger/(v2.1.7, updated 3/26/2004)
W32/Bagle.u@MM (also known as W32.Beagle.u@mm) is spread via mass mailing
and arrives in an email message with a spoofed FROM address, blank
subject, blank body, and a randomly named attachment with an .EXE file
extension (8,208 bytes).
The email has the following characteristics:
From: (spoofed or forged)
Email addresses are harvested from files on the victim's computer with
extensions .wab, .txt, .msg, .htm, .shtm, .xml, .dbx, .mbx, .eml, .asp,
.jsp, .xls, ... (for
complete list of file extensions). The worm mass-mails itself to
recipients extracted from the victim's computer.
Subject: (blank)
Body: (blank)
Attachment: random file name with .EXE extension (8,208 bytes)
MSHEARTS.EXE (Windows Hearts game) is run (if present on the infected
computer) when the worm executes.
The worm opens TCP port 4751 on the infected computer. The exact
functionality of this backdoor is under investigation. It is suspected
that it may allow downloading and execution of files.
It sends notification (containing port number and ID number) via HTTP to a
remote script at http://www.werde.de.
The worm copies itself into the default Windows System directory
(%SysDir%) as GIGABIT.EXE. For example, c:\WinNT\System32\GIGABIT.EXE.
It adds the following Registry key to hook system startup:
It creates the following Registry key:
The worm checks the system date when it is executed. If it is Jan. 1, 2005
or later, it terminates.
with values "fr1n" and "gsed".
March 22, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4340 (released 3/22/2004 8:00 am HST)
Minimum VirusScan scan engine: 4.2.40
For more information: http
://vil.nai.com/vil/content/v_101119.htm
Stinger Removal Tool: http://vil.nai.c
om/vil/stinger/(updated: 3/22/2004 HST)
The Netsky.p virus has two methods of spreading itself - first mass mailing and the second is vulnerable Microsoft Internet Explorer 5.01 and 5.5. The virus will install its own SMTP server on the infected computer so that it can send out infected message
s to email addresses that it finds on the infected computer. The virus will search a variety of files and glean email addresses from these files. Some examples of the files are XML, HTML, HTM, and VBS. For a complete list, please visit the McAfee informat
ion above. This means that users might complain about numerous return to sender email messages that they never sent out or they do not know the person that they supposed to have sent the email message to.
The virus does these things to ensure that it runs on startup. The virus on an infected computer will copy itself to the Windows directory. The file name is FVProtect.exe. It will also create other files:
The virus will create a registry key
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
"Norton Antivirus AV" = %WinDir%\FVProtect.exe
Once it copies itself to these directories, the virus' file name will entice the users of the shared resource to execute it. Some of the file names are Adobe Photoshop 10 full.exe and Ahead Nero 8.exe. For a complete list, please visit http://vil.nai.com/vil/content/v_101119.htm
March 15, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4338 (released 3/15/2004 1:53 pm HST)
Minimum VirusScan scan engine: 4.2.40
For more information: http
://vil.nai.com/vil/content/v_101098.htm
Stinger Removal Tool: http://vil.nai.com/vil/stinger/(updated: 3/15/2004)
The bagle.p virus is a mass-mailing virus that will send itself as an infected attachment to other people whose email address existed on the victim's computer. The email addresses are gleaned from many different file types - WAB, TXT, MSG, HTM, SHTM, STM,
XML, DBX, MBX, MDX, EML, NCH, MMF, ODS, CFG, ASP, PHP, PL, WSH, ADB, TBB, SHT, XLS, OFT, UIN, CGI, MHT, DHTM, AND JSP files. The email message will look like it is from an authoritative source and the topic is usually concerning the person's email accoun
t or password.
Here is an example of what a bagle.p infected message would look like:
The bagle.p will infect the victim's computer after the attachment is executed. The virus will make some registry edits so that it can set up a SMTP server on the victim's computer. It will use this SMTP server to spread itself on the Internet.
To: therese@hawaii.edu
From: support@hawaii.edu
Subject: E-mail account security warning
Dear user of hawaii.edu,
mailing system wants to let you know that, Your e-mail account has been temporary disabled because of unauthorized access. Our main mailing server will be temporary unavaible for next two days, to continue receiving mail in these days you have to configur
e our free auto-forwarding service.
The hawaii.edu team http://www.hawaii.edu
---------------end of EXAMPLE message-----------
CurrentVersion\Run "winupd.exe" = C:\WINNT\SYSTEM32\winupd.exe
The bagle.p virus will attempt to turn off many of the popular security products from the TSR memory so that it can avoid being detected.
For a complete list of TSRs that it tries to turn off, please visit http://vil.nai.com/vil/content/v_101098.htm
The most damaging part of bagle.p is that it will search the hard drives for *.EXE files and it appends the EXE files with its own encryption code. The file size will increase about 45KB and the time and date stamps will change to the time and dat
e of infection.
March 13, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4337 (released 3/13/2004 10:00 pm HST)
Minimum VirusScan scan engine: 4.2.40
For more information: http://vil.nai.com/vil/content/v_101095.htm
Stinger Removal Tool: http://vil.nai.com/vil/stinger/(updated: 3/13/2004 at 10:00 PM HST)
The W32/Bagle.n virus is masquerading as an official email message with an attachment. The email message looks like it is from one of these accounts but it is spoofed or faked.
Subject line examples:
There is a wide variety of Attachment explanations, Password Information, Closings, and Attachment file names. The message body is a better way to identify a virus infected message. The message might contain one of the following sentences:
EXAMPLES
The closing statement might have a URL at the end of the message to make the message look a bit authentic. Be forewarned, most Internet Service Providers and the University of Hawaii do not send out email messages concerning your email account with
an attachment unless you requested information.
If the infected attachment is executed, the virus will infect the Windows computer. It will install its own SMTP server (email server) so that it can spread itself on the Internet, port 2556 is opened so that a remote connection could be made to the infec
ted computer, there are some registry entries, the virus resides in a file that looks like a TrueType font file, and it attempts to turn off a number of security processes such as antivirus software and firewall software processes.
Here are some examp
les of processes:
If you think that you are infected, please download the Stinger and run a full scan on your computer.
March 8, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4335 (released 3/8/2004 2:30 pm HST)
Minimum VirusScan scan engine: 4.2.40
For more information: http://vil.nai.com/vil/content/v_101083.htm
Stinger Removal Tool: http://vil.nai.com/vil/stinger/
NAI raised the threat of this newly detected variant W32/Netsky.j@MM to MEDIUM due to increased prevalence and released DAT 4335 early to detect this new threat. Please update your McAfee DAT file to 4335 as soon as possible, using the manual Update Now m
ethod.
Note: this variant is also known as W32.Netsky.k@MM by Symantec. To add to the confusion, NAI already has its own W32/Netsky.k@MM variant.
W32/Netsky.j@MM worm arrives via email with a spoofed or forged FROM address and a .PIF attachment (22,016 bytes).
The worm arrives via email with these characteristics:
From: (forged address taken from infected system)
Subject: (one of the following list)
Body: one of the following)
Attachment: filename taken from strings within worm, with a .PIF extension:
The worm harvests email addresses from files on the local system with the following file extensions:
and avoids sending itself to email addresses for anti-virus and security companies. The virus uses its own STMP engine to construct messages and to mass mail itself.
The worm copies itself into the default Windows directory %WinDir% (eg. C:\WINDOWS, C:\WINNT) using the filename WINLOGON.EXE.
Note: A valid Windows file exists in the Windows System directory.
A Registry key is created to load the worm at system start.
It attempts to remove various Registry values, some of which are associated with other viruses, trojan, and applications.
If you are infected, please make sure you have the McAfee DAT file 4335 (released on March 8, 2004) and a scan engine of 4.2.40 or higher. You may run a scan on all files to detect and clean up this worm. If you suspect that your computer is infected with
W32/Netsky.j@MM, download and run the updated Stinger removal tool (v2.1.2, 3/8/04).
(also known as W32/Roca-A)
March 8, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4334 (released 3/8/2004 7:30 am HST)
Minimum VirusScan scan engine: 4.2.40
For more information: http://vil.nai.com/vil/content/v_101081.htm
Stinger Removal Tool: http://vil.nai.com/vil/stinger/
March 8, 2004 10:00 am HST
NAI raised the risk level of the W32/Sober.d@MM variant to MEDIUM due to increased prevalence. Please update your McAfee DAT to 4334 as soon as possible, using the manual updater method.
W32/Sober.d@MM arrives via email pretending to be a patch from Microsoft for the Mydoom virus (written in English or German). The attachment is a file with an .EXE or .ZIP extension. *** Important: Microsoft never sends patches via email attachment! **
*
Summary of the worm:
From: (sender)@microsoft.com (where "sender" is one of the following)
Subject: Microsoft Alert: Please Read! (English version starts with this)
Body:
(English version)
New MyDoom Virus Variant Detected!
A new variant of the W32.Mydoom (W32.Novarg) worm spread rapidly through the Internet.
Anti-virus vendor Central Command claims that 1 in 45 e-mails contains the MyDoom virus.
The worm also has a backdoor Trojan capability. By default, the Trojan component listens on port 13468.
Protection:
Please download this digitally signed attachment.
This Update includes the functionality of previously released patches.
+++
+++ One Microsoft Way, Redmond, Washington 98052
+++ Restricted Rights at 48 CFR 52.227-19 com
Attachment: either a .EXE or .ZIP with a filename (one of the following) and a optional 5- or 10-digit random number (33,792 bytes)
For example, MS-UD89021.EXE or MS-Q4532364791.EXE.

%SYSDIR%\diagwinhost.exe
It also adds the following registry key to run itself at startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion
\Run\disc32data "spool32" = %SYSDIR%\diagwinhost.exe
The filenames and Registry keys are random and are made up from the following strings:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion
\RunOnce "diagdir" = %SYSDIR%\diagwinhost.exe %1
The worm also drops the following files into the %SYSDIR%:
If you are infected, please make sure you have the McAfee DAT file 4334 (released on March 8, 2004) and a scan engine of 4.2.40 or higher. You may run a scan on all files to detect and clean up this worm. If you suspect that your computer is infected with
W32/Sober.d@MM, download the updated Stinger removal tool (v2.1.1, 3/8/04).
(also known as W32.Beagle.j@mm)
March 2, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4332 (released 3/2/2004 6:00 pm HST)
Minimum VirusScan scan engine: 4.2.40
For more information: http://vil.nai.com/vil/content/v_101071.htm
Stinger Removal Tool: http://vil.nai.com/vil/stinger/
NAI raised the risk level of the W32/Bagle.h@MM variant to MEDIUM due to increased prevalence. Please update your McAfee DAT to 4332 as soon as possible. If you suspect that your computer is infected with W32/Bagle.j@MM, download the updated Stinger remov
al tool (v2.1.0, 3/2/04).
This worm is spread via email with a spoofed FROM address and a carefully crafted email message posing to be a problem with your email account. At first glance, it appears to be a legitimate email warning notification. The attachment may be a password-pro
tected ZIP file or a file with an .EXE or .PIF extension. The password is included in the message body. It also copies itself to folders containing the phrase shar in its filename, folders commonly used in peer-to-peer filesharing.
It also opens TCP port 2745 on the infected computer for remote connections.
The email arrives with the following characteristics:
From: (spoofed address)
Subject: (one of the following)
Body: (carefully constructed from parts to make it appear like an authentic message)
Greeting (one of the following)
Main Message Text (one of the following)
Attachment Explanation (one of the following)
Password Information (if received as a ZIP file)
Closing (one of the following)
The (user's domain) team http://www.(user's domain)
Attachment: (one of following with .EXE, .PIF, or .ZIP extension)
The worm uses the WordPad icon to make it appear that the attachment is a Wordpad document but it is really an executable file.
The worm copies itself to the Windows System directory as IRUN4.EXE.
C:\WINNT\SYSTEM32\IRUN4.EXE
It creates a file IRUN4.EXEOPEN which is either a copy of itself or a ZIP file (~13KB) to be sent in email.
It adds the following registry key to hook system startup:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
The worm attempts to terminate security processes.
"ssafe.exe" = C:\WINNT\SYSTEM32\irun4.exe
The worm contains its own SMTP server to construct infected email messages to send out, using a spoofed or forged FROM address. If you receive an email alert that you sent an infected email, your computer may not necessarily be infected because of
spoofing. It gathers email addresses from files on the infected computer with these extensions:
The virus is careful not to send itself to email addresses that contain these words to avoid detection.
The worm copies itself to folders whose filename includes the phrase shar, commonly used in peer-to-peer filesharing applications such as KaZaa, Bearshare, Limewire, etc. If you have these P2P applications installed, beware! It's recommended that t
hese applications be removed for security reasons. The infected files are:
(also known as W32.Beagle.h@mm)
March 2, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4331 (updated 3/2/2004 9:00 am HST on UH sites but doesn't work; use DAT 4332)
Minimum VirusScan scan engine: 4.2.40
For more information: http://vil.nai.com/vil/content/v_101068.htm
Stinger Removal Tool: http://vil.nai.com/vil/stinger/
NAI raised the risk level of the W32/Bagle.h@MM variant to MEDIUM due to increased prevalence. McAfee DAT 4331 was not working and was reported to NAI. McAfee DAT 4332 was released early to detect the W32/Bagle.j@MM virus and will detect the W32/Bagle.h@M
M variant as well. Please update your DAT file to 4332 as soon as possible. If you suspect that your computer is infected with W32/Bagle.h@MM, download the updated Stinger removal tool (v2.1.0, 3/2/04).
This worm is spread via email with a spoofed FROM address and a password-protected ZIP file attachment. The attachment's icon makes it appear as a folder. The password is included in the message body. It also copies itself to folders containing the phrase
shar in its filename, folders commonly used in peer-to-peer filesharing.
It also opens TCP port 2745 on the infected computer for remote connections.
The email arrives with the following characteristics:
From: (spoofed address)
Subject: (one of the following)
Body: (one of the following)
Attachment: password-protected ZIP file with randomly named executable within ZIP file.
The password is included in the message body. The executable file uses an icon for a folder but is actually an executable file.
The worm copies itself to the Windows System directory as illr54n4.exe.
C:\WINNT\SYSTEM32\i11r54n4.exe (21,318 bytes)
It adds the following registry key to hook system startup:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
It adds this key to the registry:
"rate.exe" = C:\WINNT\SYSTEM32\i11r54n4.exe
HKEY_CURRENT_USER\Software\Winexe "open"
It will also create other files in the Windows System directory:
W32/Bagel.h@MM is similar to the .f variant.
The worm contains its own SMTP server to construct infected email messages to send out, using a spoofed or forged FROM address. If you receive an email alert that you sent an infected email, your computer may not necessarily be infected because of
spoofing. It gathers email addresses from files on the infected computer with these extensions:
The virus is careful not to send itself to email addresses that contain these words to avoid detection.
It tries to contact the virus author by calling PHP scripts on remote sites.
http://postertog.de/scr.php
At the time of this post, the script did not exist on these web sites.
http://www.gfotxt.net/scr.php
http://www.maiklibis.de/scr.php
The worm copies itself to folders whose filename includes the phrase shar, commonly used in peer-to-peer filesharing applications such as KaZaa, Bearshare, Limewire, etc. If you have these P2P applications installed, beware! It's recommended that t
hese applications be removed for security reasons. The infected files are:
(also known as W32.Beagle.E@MM)
March 1, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4330 (released 2/29/2004)
Minimum VirusScan scan engine: 4.2.40
For more information: http://vil.nai.com/vil/content/v_101061.htm
Stinger Tool Available: http://vil.nai.com/vil/stinger/
The email arrives with the following characteristics:
From: (spoofed address)
Body: (message body is empty)
Subject: (one of following)
Attachment: randomly named executable within a small ZIP file (~16KB)
The executable file uses an icon for a text file but is actually an executable file.
After the infected file is executed, Notepad will appear with a blank window.
This mass-mailing worm has the following characteristics:
The email addresses are gathered from these files:
Additionl windows ME and XP removal considerations: http://vil.nai.com/vil/SystemHelpDocs/DisableSysRestore.htm
The virus is careful not to send itself to email addresses that contain these words because it wants to avoid detection.
It tries to contact the virus author by calling PHP scripts on remote sites.
http://permail.uni-muenster.de/scr.php
http://www.songtext.net/de/scr.php
http://www.sportscheck.de/scr.php
At the time of this post, the script did not exist on these web sites.
The virus listens on TCP port 2745 for remote connections.
It will also create other files in this directory:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run "rate.exe" = C:\WINNT\SYSTEM32\i1ru74n4.exe
March 1, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4328 (released 2/25/2004)
Minimum VirusScan scan engine: 4.2.40
For more information: http://vil.nai.com/vil/content/v_101064.htm
W32/Netsky.d is a virus that will spread via mass mailing. It has its own SMTP server that will make a direct connection to your mail server (e.g. mail.hawaii.edu) and sends out infected attachments (17,424 bytes) with a PIF extension to email addresses t
hat it finds on the local system in address book files, word processing files (i.e. doc), and web files such as htm, asp, and cgi. Please see the list of file extensions below. The messages will impersonate (spoof) the sender's email address using addres
ses found in these files. Do not open attachments that arrive with "return to sender" messages from people you do not know. Please delete these messages and purge them from your mail boxes.
This is a list of files that Netsky uses to gather email addresses to impersonate (spoof).
The worm arrives in an email message with the following characteristics:
From: (forged or spoofed address from infected system)
Subject:(one of the following)
Body: (one of the following)
Attachment: filenames taken from strings within the worm, with a .PIF extension.
Possible attachment names are:
Netsky copies itself to the default Windows folder using the filename WINLOGON.EXE
Note: a legitimate WINLOGON.EXE file exists in the Windows System directory.
Netsky will also remove the registry edits made by previous viruses such as MyDoom, Netsky.a, and others. It will also remove some services from the registry.
The virus removes various Registry values associated with other recent virus (W32/Netsky.a@MM, W32/Netsky.b@MM, W32/Mydoom.a@MM, W32/Mydoom.b@MM, W32/Mimail.t@MM).
"ICQ Net" = %WinDir%\WINLOGON.EXE - stealth
Please use the Stinger tool to detect Netsky if you do not know what to do. The Stinger tool may be downloaded from http://vil.nai.com/vil/stinger/.
Feb. 27, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4329 (released 2/27/2004 at 4:00 pm HST)
Minimum VirusScan scan engine: 4.2.40
For more information: http://vil.nai.com/vil/content/v_101059.htm
Stinger Tool Available: Yes. http://vil.nai.com/vil/stinger/
The body of the email messages are empty with a variety of subject lines. McAfee is still learning about this virus so these are only some of the subject lines - Accoutns department, Ahtung!, the employee, and Camila. The attachment is a small ZIP file th
at contains
a file that looks like an Excel file but it is an executable file.
After the infected Excel file is executed, Notepad will appear with a blank window.
The email addresses are gleaned from these files:
The virus is careful not to send itself to email addresses that contain these words because it wants to avoid detection.
It tries to contact the virus author by calling PHP scripts on remote sites.
http://permail.uni-muenster.de/scr.php
http://www.songtext.net/de/scr.php
http://www.sportscheck.de/scr.php
At the time of this post, the script did not exist on these web sites.
The virus listens on TCP port 2745 for remote connections.
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run "gouday.exe" = C:\WINNT\SYSTEM32\README.EXE
Feb. 25, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4328 (released 2/25/2004)
Minimum VirusScan scan engine: 4.2.40
For more information: http://vil.nai.com/vil/content/v_101048.htm
This is a list of files that Netsky uses to glean email addresses to impersonate.
The last extension is one of the following:
{E6FB5E20-DE35-11CF-9C87-00AA005127ED}\InProcServer32
Run "KasperskyAv"
Run "system."
Note: Improper removal of registry keys could cause your Windows to crash or not function at all. Please use your antivirus software or call the ITS Help Desk for assistance (808) 956-8883.
To remove this virus "by hand", follow these steps:
Please use the Stinger tool to detect Netsky if you do not know what to do. The Stinger tool may be downloaded from http://vil.nai.com/vil/stinger/.
NOTE:
DO NOT
delete the file WINLOGON.EXE from the WINDOWS SYSTEM directory as that is a valid Windows system file. (i.e. c:\windows\system, c:\windows\system32, c:\winnt\system, or c:\winnt\system32)
Windows\CurrentVersion\Run
Windows\CurrentVersion\Run
Feb. 23, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4327 (released 2/23/2004)
Minimum VirusScan scan engine: 4240
For more information: http://vil.nai.com/vil/content/v_101038.htm
The email has the following characteristics:
From: (spoofed or forged address)
Subject: (one of following)
Body: (varies, such as)
Attachment: (variable filename with .cmd, .bat, .pif, .com, .scr, .exe extension or may be contained in a .ZIP file)
The icon for the attachment may make it appear to be a text file.
It copies itself to the WINDOWS SYSTEM directory using random filenames, e.g. hiruszomrk.exe (%SYSDIR%hiruszomrk.exe).
It creates a registry key to load itself on startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\
CurrentVersion\Run "nhch" = %SYSDIR%\hiruszomrk.exe
It also uses a DLL that it creates in the Windows System directory as:
%SYSDIR%\vppu.dll (8,068 bytes)
The worm copies itself as .ZIP or .EXE files in different directories on the local hard drive and mapped drives. The filenames are random and 34 Kbytes in size. The worm searches the %System% folder on drives C: through Z: and deletes files with .b
mp, .avi, .jpg, .sav, .xls, .doc, and .mdb extensions.
The worm harvests email addresses from files on drives C: to Z:, Temporary Internet Files folder (Internet Explorer web browser cache), and the Windows address book. It uses its own SMTP engine to construct outgoing messages.
The worm checks current running processes and attempts to shut down anti-virus and other processes.
If the system date is between the 17th and 22nd of the month, it performs a Denial of Service (DoS) attack on www.microsoft.com and www.riaa.com using random ports on the infected computers.
The worm listens on TCP port 1080 and opens ports from 3000 through 5000.
If you are infected, please make sure you have the McAfee DAT file 4327 (released on Feb. 23, 2004) and a scan engine of 4.2.40 or higher.
You may run a scan on all files to detect and clean up this worm. The stand-alone Stinger removal
tool (v.2.0.3, 2/23/04) has been updated to detect and clean this threat.
Feb. 18, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4325 (released 2/18/2004)
Minimum VirusScan scan engine: 4240
For more information: http://vil.nai.com/vil/conten
t/v_101034.htm
The email has the following characteristics:
From: (spoofed or forged address taken from infected system) or skynet@skynet.de
Subject: (one of following)
Body: (one of following)
Attachment: (random filename with double extension or may be contained in a .ZIP file, size 22,016 bytes, one of following)
followed by .doc, .htm, .rtf, or .txt and ending with .com, .exe, .pif, and .scr.
The virus gathers email addresses from files on the infected computer with .adb, .asp, .dbx , .doc, .eml, .htm, .html, .msg, .oft, .php, .pl, .rtf, .sht, .tbb, .txt, .uin, .vbs, .wab extensions. It mails itself to harvested email addresses using its own S
MTP engine to construct messages.
Upon execution, a fake error message (The file could not be opened!) may be displayed.
It copies itself to the default WINDOWS directory (c:\windows for Windows XP, c:\winnt for Windows NT/2000, c:\windows for Windows 95/98/ME) as SERVICES.EXE. Note: there is a legitimate Windows services.exe file in the WINDOWS SYSTEM directory.
It creates a registry key to load itself on startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\
CurrentVersion\Run "service" = C:\WINNT\services.exe -serv
The worm copies itself to the share or sharing folder on the local system and on mapped network drives using one of the following filenames:
The worm also drops many .ZIP files containing the worm (22,016 bytes). The compressed file usually uses a filename with a double extension, such as .doc.pif, .rtf.com, .rtf.scr. These are the .ZIP filenames:
The worm also removes registry keys associated with W32/Mydoom.a@MM and W32/Mydoom.b@MM viruses.
If you are infected, please make sure you have the McAfee DAT file 4325 (released on Feb. 18, 2004) and a scan engine of 4.2.40 or higher.
You may run a scan on all files to detect and clean up this worm. The stand-alone Stinger removal
tool (v.2.0.2, 2/18/04) has been updated to detect and clean this threat.
Feb. 17, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4324 (released 2/17/2004)
Minimum VirusScan scan engine: 4240
For more information: http://vil.nai.com/vil/conten
t/v_101030.htm
The email has the following characteristics:
From: (address is spoofed)
Subject: ID (random string)... thanks
Body:
Yours ID (random string2)
--
Thank
Attachment: (random filename with .EXE extension, size 11,264 bytes)
The virus gathers email addresses from files on the infected computer with .wab, .txt, .htm, and .html extensions. It mails itself to harvested email addresses using its own SMTP engine. However, it doesn't mass-mail itself to addresses that include @hotm
ail.com, @msn.com, @microsoft, and @avp.
The virus listens to TCP port 8866 for remote connections. This use of this backdoor is being investigated by NAI.
A notification is sent to the author via HTTP. A GET request with port number and "id" is sent to a PHP script on remote servers. Block access to the following domains:
When the attachment is run and the system date is Feb. 25, 2004 or later, the virus exits and doesn't propagate.
If the system date is before Feb. 25, 2004, the virus runs the standard
Windows Sound Recorder program (SNDREC32.EXE). The virus uses the same
icon as the Windows Sound Recorder.
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It also copies itself to the Windows System directory (c:\windows\system32 for Windows XP, c:\winnt\system32 for Windows NT/2000, c:\windows\system for Windows 95/98/ME) as au.exe.
It creates a registry key to load itself on startup:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\
It creates two additional registry keys:
Run "au.exe" = C:\WINNT\System32\au.exe
HKEY_CURRENT_USER\Software\Windows2000 "frn"
If you are infected, please make sure you have the McAfee DAT file 4324 (released on Feb. 17, 2004) and a scan engine of 4.2.40 or higher.
You may run a scan on all files to detect and clean up this worm. The stand-alone Stinger removal
tool (v.2.0.1, 2/17/04) has been updated to detect and clean this threat.
HKEY_CURRENT_USER\Software\Windows2000 "gid"
Jan. 29, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4321 (released 1/29/04)
Minimum VirusScan scan engine: 4240
For more information: http://vil.nai.com/vil/content/v_100989.htm
Please update your McAfee DAT to 4321 as soon as possible.
W32/Mimail.s@MM is a mass-mailing worm that attempts to steal credit card information by displaying a fake message that your Microsoft Windows license has expired.
The worm harvests email addresses by appending .org, .net or .com to
strings from files on an infected computer. The harvested email addresses are saved in c:\windows\outlook.cfg. The worm has its own SMTP engine to construct email messages with varying
subject lines, message bodies and attachment names.
For example,
Subject: here is the file you asked for
Body: Hi! Here is the file you asked for!
Attachment: document.txt.scr
Possible attachment file extensions include:


When the attachment is opened, the worm copies itself to c:\Windows\rabbit.exe and c:\Windows\x (worm body).
If you are infected, please make sure you have the McAfee DAT file 4321 (released on Jan. 29, 2004) and a scan engine of 4.2.40 or higher. You may run a scan on all files to detect and clean up this worm.
CurrentVersion\Run "RabbitWannaHome" = %WinDir%\rabbit.exe
(alias W32.Novarg.A@MM, Novarg, Win32/Shimg)
Jan. 26, 2004
Risk Assessment: High Outbreak
Minimum VirusScan DAT: 4319 (released 1/26/04 6:35 pm HST)
Minimum VirusScan scan engine: 4240
For more information: http://vil.nai.com/vil/content/v_100983.htm
Please update your McAfee DAT to 4319 as soon as possible. The date of the
virus definition will appear as Jan. 27, 2004 in VirusScan.
NAI has updated the Stinger
removal tool (v1.9.7, 1/26/04) to detect and repair W32/Mydoom@MM.
You must reboot after running Stinger to complete the repair. Note:
Windows ME/XP users need to disable system restore before running Stinger.
This mass-mailing and peer-to-peer file-sharing worm arrives in email with the following characteristics:
From: (spoofed)
Subject: (Random) possible subject lines:
Body: (Varies, such as)
Attachment: (varies [.exe, .pif, .cmd, .scr] - often arrives in a ZIP archive) (22,528 bytes)
The icon for the attachment makes it appear to be a text file. Attachment file names are common names but may be random. Examples include:
When the attachment is opened, Notepad opens filled with garbage characters. It copies itself to the local system with filenames:
where %SysDir% is the Windows System directory.
It creates the file shimgapi.dll (4,096 bytes) in the Windows System directory. This DLL is injected into EXPLORER.EXE upon reboot via registry key:
It creates the registry entry to hook Windows startup:
The worm opens a connection on TCP port 3127 suggesting remote control. On the first system startup after Feb. 2, 2004, the worm changes its behavior to start a denial of service (DoS) attack against the sco.com domain. The DoS attack will stop on Feb. 12
, 2004.
CurrentVersion\Run "TaskMon" = %SysDir%\taskmon.exe
The worm copies itself in the KaZaa Shared Directory with filenames such as:
with file extensions .pif, .scr, or .bat.
The worm harvests email addresses from the local system from files with the following extensions:
If you are infected, please make sure you have the McAfee DAT file 4319 (released on Jan. 27, 2004) and a scan engine of 4.2.40 or higher. You may run a scan on all files to detect and clean up this worm.
Jan. 26, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4318 (released 1/26/2004)
Minimum VirusScan scan engine: 4240
For more information: http://vil.nai.com/vil/content/v_100980.htm
The email has the following characteristics:
From: "Elene" (F (removed) ENSUICIDE@HOTMAIL.COM) (profanity removed)
Subject: Important information for you. Read it immediately !
Body: Here is my photo, that you asked for yesterday.
Attachment: myphoto.zip
The attachment expands to myphoto.jpg (many spaces).exe.
The worm gathers email addresses from files on the infected computer with .htm, .wab, .html, .dbx, .tbb, and .abd extensions. It mails itself
to harvested email addresses using its own SMTP engine.
When executed, the worm also copies itself on the infected computer:
where %WinDir% is the Windows directory (e.g. C:\WinNT) and %SysDir% is the Windows System directory (c:\windows\system32 for Windows XP, c:\winnt\system32 for Windows NT/2000, c:\windows\system for Windows 95/98/ME).
It creates a registry key:
HKEY_LOCAL_MaACHINE\Software\SARS
If you are infected, please make sure you have the McAfee DAT file 4318 (released on Jan. 26, 2004) and a scan engine of 4.2.40 or higher.
You may run a scan on all files to detect and clean up this worm.
Jan. 19, 2004
Risk Assessment: Medium
Minimum VirusScan DAT: 4316 (released 1/18/2004)
Minimum VirusScan scan engine: 4240
For more information: http://vil.nai.com/vil/conten
t/v_100965.htm
The email has the following characteristics:
From: (address may be forged)
Subject:Hi
Body:
Test =)
(random characters)
--
Test, yep.
Attachment: (random filename, size 15,872 bytes)
The virus gathers email addresses from files on the infected computer with .wab, .txt, .htm, and .html extensions. It mails itself
to harvested email addresses using its own SMTP engine. However, it doesn't mass-mail itself to addresses that include @hotmail.com, @msn.com, @microsoft,
and @avp.
The virus listens to TCP port 6777 that allows a remote attacker to execute commands on the local system, download executables
to the local system, and terminate and delete the worm program.
When the attachment is run and the system date is Jan. 28, 2004 or later, the virus exits and doesn't propagate. If the system
date is before Jan. 28, 2004, the virus runs the standard Windows calculator program (calc.exe). It also copies itself
to the Windows System directory (c:\windows\system32 for Windows XP, c:\winnt\system32 for Windows NT/2000, c:\windows\system for
Windows 95/98/ME) as bbeagle.exe.
It creates a registry key to load itself on startup:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\
It creates two additional registry keys:
Run "d3dupdate.exe" = C:\WINNT\System32\bbeagle.exe
HKEY_CURRENT_USER\Software\Windows98 "frun"
If you are infected, please make sure you have the McAfee DAT file 4316 (released on Jan. 18, 2004) and a scan engine of 4.2.40 or higher.
You may run a scan on all files to detect and clean up this worm. The stand-alone Stinger removal
tool has been updated to detect and clean this threat.
HKEY_CURRENT_USER\Software\Windows98 "uid"
Dec. 22, 2003
Risk Assessment: Medium
Minimum VirusScan DAT: 4310 (released 12/21/2003)
Minimum VirusScan scan engine: 4240
For more information: http://vil.nai.com/vil/conten
t/v_100912.htm
W32/Sober.c@MM is a mass-mailing worm written in Visual Basic. The outgoing messages have varying subject lines, message bodies and attachment names (in either English or German). There are two worm processes running on the infected computer to ensure tha
t the worm stays memory resident.
Summary of the worm:
Subject: (possible subject lines)
Attachment: (possible filenames)
Attachments may end with a .com, .bat, .cmd, .pif, .scr, .exe or .com extension, and may be preceeded with a .txt or .doc, and/or a random number.

These two files are responsible for monitoring and maintaining that the worm stays memory resident. Upon termination of one worm process, another copy is quickly restarted.
It modifies the registry so the worm is run on system startup, where "string" varies between infections.
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\
If you are infected, please make sure you have the McAfee DAT file 4310 (released on Dec. 21, 2003) and a scan engine of 4.2.40 or higher. You may run a scan on all files to detect and clean up this worm.
Run "(string)" = %SysDir%\ONDMONSTR.EXE
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\
Run "(string)" = %SysDir%\ONDMONSTR.EXE
November 14, 2003
Risk Assessment: Medium
Minimum VirusScan DAT: 4304 (released 11/14/2003)
Minimum VirusScan scan engine: 4240
For more information: http://vil.nai.com/vil/conten
t/v_100822.htm
W32/Mimail.i@MM is a mass-mailing worm which attempts to steal credit card information by displaying a fake PayPal message, announcing the expiration of your PayPal account. It spreads with attachment www.paypal.com.scr or paypal.asp.scr.
Summary of the worm:


It modifies the registry so the worm is run on system startup.
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\
If you are infected, please make sure you have the McAfee DAT file 4304 (released on Nov. 14, 2003) and a scan engine of 4.2.40 or higher. You may run a scan on all files to detect and clean up this worm.
Run "SvcHost32" = %WinDir%\svchost32.exe
October 31, 2003
Risk Assessment: Medium
Minimum VirusScan DAT: 4301 (released 10/31/2003)
Minimum VirusScan scan engine: 4160
For more information: http://vil.nai.com/vil/conten
t/v_100795.htm
The worm was initially "seeded" by mass-spamming with attachment undelivered.hta which creates the file c:\mware.exe. This executable is the worm, W32/Mimail.c@MM. When the .hta file is run, the following message is displayed:
Your message will be sent again in 1 hour. If it doesn't arrive - we will delete it from the queue.
W32/Mimail.c@MM is a mass-mailing worm which spreads with attachment PHOTOS.ZIP (contains PHOTOS.JPG.EXE) and can cause a denial of service attack.
Summary of the worm:

It modifies the registry so the worm is run on system startup.
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\
If you are infected, please make sure you have the McAfee DAT file 4301 (released on October 31, 2003) and a scan engine of 4.2.60. You may run a scan on all files to detect and clean up this worm.
Run "NetWatch32" = C:\WINNT\NETWATCH.EXE
If you need assistance, please call the ITS Help Desk (808) 956-8883 or toll-free from neighbor islands (800) 558-2669.
September 18, 2003
Risk Assessment: Medium (for Home Users)
Minimum VirusScan DAT: 4294 (released 9/18/2003)
Minimum VirusScan scan engine: 4160
For more information: http://vil.nai.com/vil/conten
t/v_100662.htm
Network Associates has raised the alert level of W32/Swen@MM to MEDIUM risk for Home Users due to increased prevalence of this worm.
In some cases, it pretends to be a Microsoft Security Update. It can also impersonate mail delivery failure notices and attaches itself as a
randomly named executable.
It terminates various processes including Regedit, ZoneAlarm, BlackIce, VirusScan, Norton Antivirus,
F-Prot, Esafe, and others. It spreads via various mechanisms including:
The virus contains its own SMTP engine to construct outgoing email messages. Multiple subject lines and attachment names are constructed from
strings within the worm to be used in outgoing messages. Target email addresses are extracted from files on the victim computer.

The worm copies itself to the startup folder on mapped network drives using a random filename.
The worm drops a SCRIPT.INI file (123 bytes) into the mIRC program folder to propagate via IRC (using dcc send).
The worm copies itself in a directory (random name) within the system temp directory, using suggestive names such as
Symptoms
Various registry keys are modified to hook the execution of .BAT, .COM, .EXE, .PIF, .REG, and .SCR files.
If you are infected, please make sure you have the McAfee DAT file 4294 (released on September 18, 2003) and a scan engine of 4.2.60. You may run a scan on all files to detect and clean up this worm.
If you need assistance, please call the ITS Help Desk (808) 956-8883 or toll-free from neighbor islands (800) 558-2669.
August 28, 2003
Risk Assessment: Medium
Minimum VirusScan DAT: 4290 (released 8/28/2003)
Minimum VirusScan scan engine: 4140
For more information: http://vil.nai.com/vil/conten
t/v_100560.htm
Network Associates has raised the alert level of W32/Dumaru.a@MM from low to medium risk. W32/Dumaru.a@MM is a mass mailing worm, with its own SMTP engine, that will send email to addresses found in the following files on the infected computers hard drive
:
The email message will look like it is from Microsoft Security ("Microsoft" security@microsoft.com) and it will have an attachment called patch.exe. The patch.exe file carries the worm. If you receive a message with Microsoft security and a patch.exe, ple
ase DELETE it immediately. Microsoft does not email any of their security patches to customers (http://www.microsoft.com/technet/treeview/default.asp?u
rl=/technet/security/policy/swdist.asp).

How to Clean
To remove this virus "by hand", follow these steps:
WinNT/2K/XP - Terminate the processes:
LOAD32.EXE
VXDMGR32.EXE
DLLREG.EXE
Note:
%WINDIR% is the c:\windows or c:\winnt
%SYSDIR% is c:\windows\system or c:\winnt\system
If you are infected, please make sure you have the McAfee DAT file 4290 (released on August 28, 2003) and a scan engine of 4.2.60. You may run a scan on all files to detect and clean up this worm.
If you need assistance, please call the ITS Help Desk (808) 956-8883 or toll-free from neighbor islands (800) 558-2669.
August 19, 2003
Risk Assessment: Medium
Minimum VirusScan DAT: 4287 (released 8/19/2003)
Minimum VirusScan scan engine: 4160
For more information: http://vil.nai.com/vil/content/v_100561.htm
There is a new variant of the W32/Sobig virus. Like the other variants, it spreads via mass mailing (uses its own SMTP engine)
and over network shares (not confirmed in testing by NAI yet). The worm
has garbage data appended at the end of the file so exact filesize may vary.
The standalone NAI
Stinger tool has been updated to detect and remove this threat.
The worm copies itself on the victim machine as C:\WINNT\WINPPR32.EXE. It drops a configuration file in the default
Windows directory as C:\WINNT\WINSTT32.DAT.
The following registry keys are added to hook the system on startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
"TrayX" = C:\WNNT\WINPPR32.exe /sinc
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
"TrayX" = C:\WNNT\WINPPR32.exe /sinc
Target email addresses are harvested from files on the infected computer with the following extensions:
The worm may arrive in email with the following
characteristics:
From: (the from: address may be spoofed or forged with an email address found on the victim's machine)
Subject:
Attachment:
The worm attempts to send NTP packets to remote NTP servers using destination port 123.
August 18, 2003
Risk Assessment: Medium
Minimum VirusScan DAT: 4286 (released 8/18/2003)
Minimum VirusScan scan engine: 4160
For more information: http://vil.nai.com/vil/content/v_100559.htm
The worm exploits the MS03-026 RPC buffer overflow vulnerability
and is not related to the W32/Lovsan.worm.d (aka Blaster worm). It creates
high ICMP traffic on the network.
The worm spreads by scanning the local subnet on port 135 for target Windows machines with the MS03-026 vulnerability. It pings potential victim machines, and upon reply,
sends the exploit data. A remote shell is created on the target machine on TCP port 707. Victim machines are instructed to
download the worm via TFTP. Once running, the worm terminates and deletes the W32/Lovsan.worm.a process and applies the Microsoft
patch to prevent other threats from infecting the system through the same hole.
A mutex named RpcPatch_Mutex is created to ensure that only one instance of the worm is on the victim machine.
The worm installs itself in the WINS directory in the Windows System directory:
C:\WINNT\SYSTEM32\WINS\DLLHOST.EXE (10,240 bytes)
Note: there is a legitimate file named DLLHOST.EXE but it is approximately 5-6 KB.
The worm attempts to copy the TFTPD.EXE file from dllcache on the victim computer to the WINS directory and renames it to SVCHOST.EXE.
The following servicees are installed:
Display name "WINS Client"
Display name "Network Connections Sharing"
The worm attempts to download and install one of the patches for the MS03-026 vulnerability. When the system clock reaches Jan. 1, 2004, the worm will
delete itself upon execution.
Unless the system is patched for the MS03-026 vulnerability, it is susceptible to the buffer overflow attack from an infected machine.
When packets are sent to the RPC service on port 135, unpatched systems will get a buffer overflow and crash. The worm does not
have to be on the unpatched system.
Once the system is patched, it is important that the system is rebooted.
August 11, 2003
Last Revised: August 13, 2003 at 2:38 pm
Risk Assessment: Medium
Minimum VirusScan DAT: 4285 (released 8/13/2003)
Minimum VirusScan scan engine: 4160
For more information: http://vil.nai.com/vil/content/v_100547.htm
The worm is looking for victims by scanning the network for Windows
computers that do not have the MS03-026 Microsoft security patch. The
infected computer will have an open port on TCP 4444 and TFTP running. The
worm will download itself into the %windir%\system32. The file name is
msblast.exe.
Once the msblast file is executed, the worm installs a registry key
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\
Run "windows auto update" = msblast.exe I just want to say LOVE YOU SAN!!
bill
The infected computer will display error messages about the
RPC service
failing and computer will reboot.
Remedy
If you are infected already, you should unplug your network cable
from the back of the computer then restart the computer with the
network cable disconnected. (This should stop the rebooting.) You
should download the stinger program from a clean computer (a computer
that was not infected with the blaster worm). There is a NAI stinger
program that
will detect and attempt to remove the worm. You may download the file NAI
Stinger. Please read the instructions before using this tool!
After
you have removed the worm, you need to apply the Microsoft
patch
MS03-026 and other patches from Windows Update. Once the Microsoft
patch is installed, start your antivirus software and check the version.
Please make sure that the version is the most current.
Update to Remedy (8/11/2003 3:30pm)
If you are not infected, please update your McAfee VirusScan today. There
is an new DAT and SuperDAT file. Please download the new file Latest DAT and
SuperDAT File or run the autoupdate on your McAfee VirusScan
Console.
Update (8/13/2003):
Please note: %windir% is the directory in which your Windows system files are stored. The most common places are windows and winnt (ie c:\windows\system32).
Please download and use the DAT/SuperDAT file 4285 released 8/13/2003 instead of the Extra DAT.
There are reports that the worm has 2 new versions - Lovsan.b and Lovsan.c.
Lovsan.b version
The Lovsan.b will install a backdoor component that will allow an intruder to remotely control an infected computer. To indentify Lovsan.b, you should see 2 files in the %windir%\system32 - root32.exe (backdoor) and teekids.exe (worm).
Clean-up recommendations for Lovsan.b is to re-install the computer system. Please make sure that you have a backup of the computer system before this is done.
Lovsan.c version
The Lovsan.c does the same thing as the original Lovsan worm. The difference is that the blast32.exe file is called penis32.exe and it is stored in the %windir%\system32 directory. There are no reports of backdoors for this version at this time.
Clean-up recommendations for Lovsan.c is to use the NAI Stinger tool. The NAI Stinger tool will remove the registry edits but you will have to manually remove the penis32.exe file from the %windir%/system32 directory.
If you need further assistance, please call the ITS Help Desk at 956-8883
or Toll-free from neighbor islands (800) 558-2669.
August 2, 2003
Risk Assessment: Medium
Minimum VirusScan DAT: 4282 (released 8/1/03)
Minimum VirusScan scan engine: 4160
For more information: http://vil.nai.com/vil/content/v_100523.htm
This worm exploits known security vulnerabilities for which Microsoft released patches some months ago. It uses the codebase (MS02-015) and MHTML exploits (MS03-014). Please patch your systems for these vulnerabilities, if you have not already done so.
The mass mailing worm arrives in an email message with the following format:
From: Admin@current_domain (from: address may be spoofed to appear that it is coming from the current domain)
Subject: your account (variable string)
Body:
Hello there,
I would like to inform you about important information regarding your email address. This email address will be expiring. Please read attachment for details.
--- Best regards, Administrator
Attachment: message.zip
The attached .zip file contains a file named MESSAGE.HTM. The file automatically creates the file, foo.exe, in the Temporary Internet Files folder and runs it.
Note: The MS03-014 patch must be applied to prevent the automatic execution of the executable when accessing the MESSAGE.HTM file.
When run, the following files are created in the default WINDOWS %WINDIR% directory:
The virus creates the following registry key to load itself on Windows Startup:
Run "VideoDriver" = C:\WINNT\videodrv.exe
The virus checks to see if the system is connected to the Internet by trying to contact google.com. If successful, it attempts to harvest email addresses from files on the local system and sends itself to those addresses. The mailing routine tries to quer
y the mail server for the domain related to the harvested addresses. Messages are sent through that SMTP server. The local files with the following extensions are excluded from email address harvesting attempts:
The harvested addresses are stored in the eml.tmp file in the WINDOWS directory.
An additional registry key is created:
Code Store Database\Distribution Units\
{11111111-1111-1111-1111-111111111111}
July 1, 2003
Risk Assessment: Medium
Minimum VirusScan DAT: 4274 (released 6/30/03)
Minimum VirusScan scan engine: 4160
For more information: http://vil.nai.com/vil/content/v_100450.htm
The virus arrives in an email message and uses an icon almost identical to the icon associated with folders
in Windows. This mass-mailing worm gathers MSN Messenger contact addresses. It launches
Internet Explorer and connects to various news websites, displaying images of Bolivian Aymara Indian leader Evo Morales.
The e-mail arrives with the following format:
Subject: El adelanto de matrix ta gueno!!
Body: Pablo_Hack
Oye te U paso el programa para entrar a cuentas del messenger, y facilingo te lo paso a voz nomas, prometerr que no se lo pasas a nadie, ya? Respondeme que tal te parecio. chau!!
Attachment: hotmailpass.exe
The virus has a backdoor component. It leaves several TCP ports (1168, 1169, 1170 and 2536) open, allowing the hacker to
control the infected computer remotely.
When run, it copies itself to the
default Windows directory %WINDIR% with the following filenames:
(where %WINDIR% is C:\WINDOWS or C:\WINNT)
It copies itself to the %SYSDIR% directory with the following filenames:
(where %SYSDIR% is C:\WINDOWS\SYSTEM32 or C:\WINNT\SYSTEM32)
The virus creates the following registry keys to load itself on Windows Startup:
Run "System"=%WINDIR%\system.exe
Run\1\2\3\4 "System"=%WinDir%\system.exe
RunServices "System"=%WINDIR%\system.exe
RunServicesOnce "System"=%WinDir%\temp.exe
Run "System"=%WINDIR%\system.exe
Run\1\2\3\4 "System"=%WinDir%\temp.exe
RunServices "System"=%WINDIR%\commands.com
The virus also modifies the following registry keys so that the worm is executed every time an
associated file extension runs.
(hides the file extension of executables)
"(Default)"="%WinDir%\temp.exe", "%1" %*
"(Default)"="%WinDir%\command.exe", "%1" %*
"(Default)"="%WinDir%\command.exe","%1" %*
"(Default)"="%WinDir%"\commands.com", "%1" %*
"(Default)"="%WinDir%\commands.com","%1" %*
June 26, 2003
Risk Assessment: Medium
Minimum VirusScan DAT: 4273 (released 6/25/03)
Minimum VirusScan scan engine: 4160
For more information: http://vil.nai.com/vil/content/v_100429.htm
The virus is a variant of W32/Sobig.d@MM. It propagates via email and over network shares. It has its own SMTP engine for
constructing outgoing messages. The virus is sent in a ZIP archive. The outgoing messages may have a closing quote
omitted from the attachment filename, which may cause some email clients to
remove a character from the remaining filename. For example, attachments may
have a ".ZI" extension, instead of ".ZIP".
Email addresses are extracted
from files on the victim machine with the following extensions:
The worm may arrive in email with the following
characteristics:
From: (the from: address is spoofed or forged)
Body: Please see the attached zip file for details.
Attachment: (file extension may be
truncated to .ZI) your_details.zip(which contains details.pif)
The worm tries to copy itself to the following network
locations:
When the worm is executed, it drops the following files into the %windir% (default Windows)
directory:
Registry keys are added to hook system
startup:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
"SSK Service"
= %WinDir%\winssk32.exe
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
"SSK Service" = %WinDir%\winssk32.exe
June 5,
2003
Risk
Assessment: High
Minimum VirusScan DAT: 4270 (released
6/5/03)
Minimum VirusScan scan engine: 4160
For more information:
http://vil.nai.com/vil/content/v_100358.htm
June 2,
2003
Risk
Assessment: Medium
Minimum VirusScan DAT: 4268 (released
6/1/03)
Minimum VirusScan scan engine: 4160
For more information: http://vil.nai.com/vil/content/v_100343.htm
A new variant of the W32/Sobig virus was
discovered on May 31, 2003. This variant is detected as W32/Sobig.dam in the
4267 DAT (released 5/28/03). However, you will need the 4268 DAT (released
6/1/03) to detect and remove the new variant. This variant spoofs or forges the
from: address. Therefore, the perceived sender is not likely the infected
user.
This mass-mailing worm is very similar to http://vil.nai.com/vil/content/v_100307.htm.
It propagates via email and over network shares. It has its own SMTP engine for
constructing outgoing messages. The outgoing messages may have a closing quote
omitted from the attachment filename, which may cause some email clients to
remove a character from the remaining filename. For example, attachments may
have a ".PI" extension, instead of ".PIF".
Email addresses are extracted
from files on the victim machine with the following extensions:
The worm may arrive in email with the following
characteristics:
From: bill@microsoft.com (note: could be any
email address)
Subject:
Attachment: (file extension
may be truncated to .PI)
Message Body: Please see the
attached file.
The worm tries to copy itself to the following network
locations if the paths are accessible:
When the worm is
executed, it drops the following files into the %windir% (default Windows)
directory:
Registry keys are added to hook
system
startup:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
"System
MScvb" =
%WinDir%\mscvb32.exe
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
"System
MScvb" = %WinDir%\mscvb32.exe
The worm checks the system date/time. If
the date matches June 8, 2003 (or later), the worm no longer propagates.
However, it installs itself on the target machines.
(alias
W32/Palyh@MM)
May 19, 2003
(revised May 22, 2003)
Risk
Assessment: Medium
Minimum VirusScan DAT: 4265 (released
5/18/03)
Minimum VirusScan scan engine: 4160
For more information: http://vil.nai.com/vil/content/v_100307.htm
This
mass-mailing worm is very similar to http://vil.nai.com/vil/content/v_99950.htm.
It propagates via email and over network shares. It has its own SMTP engine for
constructing outgoing messages. The outgoing messages may have a closing quote
omitted from the attachment filename, which may cause some email clients to
remove a character from the remaining filename. For example, attachments may
have a ".PI" extension, instead of ".PIF".
Email addresses are extracted
from files on the victim machine with the following extensions:
The worm may arrive in email with the following
characteristics:
From:
support@microsoft.com
Subject:
Attachment: (file extension may be
truncated to .PI)
Message Body: All information is in
the attached file.
The worm tries to copy itself to the following network
locations:
When the worm is
executed, it drops the following files into the %windir% (default Windows)
directory:
Registry keys are added to hook
system
startup:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
"System
Tray" =
%WinDir%\msccn32.exe
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
"System
Tray" = %WinDir%\msccn32.exe
The worm checks the system date/time. If the
date matches May 31, 2003 (or later), the worm no longer propagates. However, it
installs itself on the target machines.
May 12,
2003
Risk
Assessment: Medium on Watch
Minimum VirusScan DAT: 4263 (released
5/12/03)
Minimum VirusScan scan engine: 4160 (to detect); 4240 (to
remove)
For more information: http://vil.nai.com/vil/content/v_100295.htm
It spreads via KaZaa
and email, by mass-mailing itself to addresses found in the Microsoft Outlook
Contacts list, Windows Address Book (WAB), and on the local system, and randomly
generated addresses, sometimes forging the sender address. The worm arrives as
an email attachment (various file names with .com, .exe, .pif, .scr extensions)
with various subject lines and body text. It has its own SMTP
engine.
Other components of the worm include:
- when it connects to an
IRC server, it opens a channel and awaits instructions from the attacker
- it connects to an
AIM chat server on port 5190 and listens for further instructions
- captures types keystrokes and stores them
in iservc.klg (encrypted file in Windows directory)
- copies itself to the default KaZaa
download directory using random file names
- runs HTTP server of port 81, displaying
information on the infected system.
- listens on port 2018, 2019,
2020, and 2021
- connects to geocities user
page to download updates
When the attachment is executed, the
worm extracts several files to the Windows (%WinDir%) directory.
It modifies the handling of .TXT files, such that accessing a .TXT file
results in the worm being run.
On WinNT/2K/XP systems, the worm creates a
service named S1TRACE.
Feb. 24,
2003
Risk
Assessment: Medium on Watch
Minimum VirusScan DAT: 4248 (released
2/19/03)
Minimum VirusScan scan engine: 4160
For more information: http://vil.nai.com/vil/content/v_100072.htm
This mass-mailing worm spreads via email by
auto-replying to all new messages found in the Outlook and Outlook Express inbox
using its own SMTP engine. It also attaches itself as one of the files listed
below and copies itself over network shares. It also drops a backdoor component,
opening port 10168 on victim computers.
The worm
auto-replies:
'I'll try to to reply as soon as possible.
Take a look
at the attachment and send me your opinion!'
>Get your Free
'domain.com' account now! <
The worm propagates itself through open
network shares, copying itself recursively to folders/subfolders, using the
following filenames:
When executed, the worm copies itself to the %System%
folder as:
The worm drops a trojan component in the %System%
directory with the following names:
The backdoor trojan opens port 10168 on the computer and
sends email notification to the hacker that the computer has been compromised.
Information about the infected computer, including system password, is also sent
to the hacker.
The following Registry keys are added to hook system
startup:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
"syshelp"
=
C:\Windows\System\syshelp.exe
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
"WinGate
initialize" = C:\Windows\System\WinGate.exe -remoteshell
A system startup
hook is also added for the backdoor
component:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
"Module
Call initialize" = RUNDLL32.EXE reg.dll ondll_reg
The following Registry
key is modified to hook the execution of text
files:
HKEY_CLASSES_ROOT\txtfile\shell\open\command
(default)
= "winrpc.exe %1"
When executed on Windows NT/2000, the worm installs
itself as a service, with display name "Window Remote Service" (runs copy of
worm with filename WINRPCSRV.EXE). One of the dropped backdoor components
(TASK.DLL) also installs as two services with display names "dll_reg" and
"Windows Management Extension".
Jan. 27,
2003
Risk Assessment: HIGH
Minimum
VirusScan DAT: Stinger removal
tool
Minimum VirusScan scan engine: N/A
For more information: http://vil.nai.com/vil/content/v_99992.htm
For a complete list of
patches that must be applied to SQL Servers that are not running SP3, go to Microsoft
Technet. The worm uses a buffer overflow in "Server Resolution" service (see
MS02-039)to
gain control on a target server. SQL Servers running Service Pack 3 are not
affected. Download SQL Server 2000
Service Pack 3.
This virus exists only in memory of unpatched
Microsoft SQL servers. This worm does not exist as a file on your system. No INI
or registry keys are created by this worm. Its only purpose is to spread from
one system to another and it does not carry a destructive payload.
This
worm causes increased traffic on UDP port 1434 and spreads between SQL servers.
It causes heavy network traffic and can effect network performance on all
systems on the network.
Removal Instructions
This will clear the worm from memory and prevent reinfection. The
corrected SSNETLIB.DDL will have version 2000.80.760.0 (right click on the DLL
icon, select Properties, click Version tab.)
NAI has a new version of the
Stinger removal tool that is designed to locate the worm in memory on infected
SQL servers and shut down the SQL processes. Stinger must be run with
Administrator privileges to shut down SQL Server. Stinger will not prevent
future reinfections, unless you install Service Pack 3.
Jan. 14,
2003
Risk
Assessment: Medium
Minimum VirusScan DAT: 4242 (released
1/11/03)
Minimum VirusScan scan engine: 4160
For more information: http://vil.nai.com/vil/content/v_99950.htm
This mass-mailing worm sends itself to all
addresses it finds in files with extensions .wab, .dbx, .htm, .html, .eml, and
.txt using its own SMTP engine. It also attempts to copy itself to open network
shares:
The
outgoing email messages are from "big@boss.com" with the following possible
subject lines:
Attachments (65,536 bytes) have one of the
following filenames:
The worm installs itself into the Windows directory as
WINMGM32.EXE and adds two registry hooks to start the program on
startup:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
"WindowsMGM"
=
C:\WINDOWS\winmgm32.exe
HKEY_LOCAL_MACHINE\Software\Windows\CurrentVersion\Run
"WindowsMGM"
= C:\WINDOWS\winmgm32.exe
The worm may contain a multidropper package
which drops a pornographic image (which is displayed) and the worm.
Jan. 9,
2003
Risk
Assessment: Medium
Minimum VirusScan DAT: 4241 (released
1/8/03)
Minimum VirusScan scan engine: 4160
For more information: http://vil.nai.com/vil/content/v_99949.htm
This mass-mailing worm also attempts to spread via ICQ, IRC, and
KaZaa. It contains a Password-Stealer payload. It tries to terminate anti-virus,
firewall and security software and drops an IRC bot script.
The worm uses
Outlook to gather email addresses in the "Sent Items" and "Inbox". It also
queries the Windows Address Book and searches for addresses within files on the
local disk with the following extensions:
Possible message subject lines include the following:
The attachment is one of the
following:
The message body is variable and may contain one
of the following:
Restricted area response team
(RART)
___________________________________
Attachment you send to is
intended to overwrite start address at 0000:HH4F
To prevent from the further
buffer overflow attacks apply the
MSO-patch.
___________________________________
or
Patch is also
provided to subscribed list of Microsoft Tech Support: to apply the patch
immediately. Microsoft strongly urges all customers using IIS 4.0 and 5.0 who
have not already done so and do not need to take additional action. Customers
who have applied that patch are already protected against the vulnerability that
is eliminated by a previously-released patch. Microsoft has identified a
security vulnerability in Microsoft IIS 4.0 and 5.0.
or
Admission
form attached below. Vote for I'm with you! FanList admits you to take in Avril
Lavigne 2003 Billboard awards ceremony Avril fans subscription
The worm
attempts to terminate anti-virus, firewall, and security processes running in
memory. It monitors the titlebar of all windows and closes them if they contain
one of the following strings:
The worm copies itselft into the %WinDIR%\SYSTEM32 directory
using a randomly generated name, e.g. A33AAAAgbab.EXE. A key is added to the
registry to execute the worm during system
boot:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\
Run "Avril Lavigne - Muse" =
C:\WINDOWS\SYSTEM32\A33AAAAgbab.EXE
(random name)
Another key is created and used as a marker that the
system is
infected:
HKEY_LOCAL_MACHINE\Software\HKLM\Software\OvG\Avril
Lavingne
It also copies itself using one of the filenames of the
attachment mentioned in the email propagation to c:\ and %WINDIR%\TEMP.
The
worm places four copies of itself using random names into the RECYCLED folder
and adds a call to itself in AUTOEXEC.BAT.
The worm tries to receive
cached passwords from the infected host and sends an email by using its own SMTP
engine via an open SMTP server (62.118.249.10 port 25 tcp).
After the
worm executes, it opens the default web browser to the Avril Lavigne web site
(http://www.avril-lavigne.com) and draws colored geometric figures on the screen
which are always "on top" of the desktop.